Minor punctuation, grammatical fixes to Starter Types and Flour Types (#64)

* Minor punctuation, grammatical fixes to Sourdough Starter Types and Flour Types

* Sourdough Starter Types minor fixes
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@@ -1,13 +1,13 @@
In this chapter we will have a closer look at different flour types
and their respective categorization. We will also look a common
and their respective categorization. We will also look at common
ways to distinguish different flours of the same type. This way you can more confidently
shop the right flour that you need.
purchase the flour that you need.
The most basic flour type is a whole flour. In this case the whole seed has
been ground to smaller pieces. Sometimes depending on what you want to bake
The most basic flour type is a whole grain flour. In this case the whole seed has
been ground to smaller pieces. Sometimes, depending on what you want to bake,
the hearty taste of the bran might not be desired. In this case you can use
whiter flours. With sieves, mills remove larger parts of the hull of the seed.
The seed already contains a pre built germ from the plant waiting to be
The seed already contains a pre-built germ from the plant waiting to be
activated. The whitest flour you can get is mostly just the starch part of the seed.
Depending on which layers are still present, names are used to describe the
type of flour.
@@ -18,13 +18,13 @@ type of flour.
\caption{A comparison of the different wheat flour types}
\end{figure}
In Germany the ash content is used to describe the flours. The lab will burn
In Germany, the ash content is used to describe the flours. The lab will burn
100 grams of flour in the oven. Then afterwards the remaining ash is extracted
and measured. Depending on the quantity the flour is categorized. If the flour
is of type 405 then 405 milligrams of ash have remained after burning the
flour. The more hull parts the flour has the more minerals remain. So the
higher the number the closer the flour is to whole flour. The numbers are
slightly different between each grain type. Generally though the higher the
flour. The more hull parts the flour has, the more minerals remain. So the
higher the number, the closer the flour is to whole flour. The numbers are
slightly different between each grain type. Generally though, the higher the
value, the heartier the taste is going to be.
\begin{figure}[htb!]
@@ -33,17 +33,17 @@ value, the heartier the taste is going to be.
\label{fig:wheat-kernel-overview}
\end{figure}
If you compare different grain types there are grains with high gluten, low gluten
If you compare different grain types, there are grains with high gluten, low gluten
and no gluten. Gluten is what enables bread to have its fluffy consistency.
Without gluten the baked goods wouldn't have the same properties. Managing
gluten makes the whole bread making process more complex as more steps are involved.
gluten makes the whole bread-making process more complex as more steps are involved.
A dough without gluten doesn't have to be kneaded. Kneading creates
the gluten bonds. The more you knead the stronger they become. With low
gluten and no gluten flours you only have to mix the ingredients together, making
sure you properly homogenize everything. During the duration of the fermentation
the gluten bonds. The more you knead, the stronger they become. With low-gluten
and no-gluten flours, you only have to mix the ingredients together, making
sure you properly homogenize everything. During the duration of the fermentation,
the gluten degrades as the microorganisms metabolize it. When too much gluten
has been converted your dough will no longer have the previously wheat-like described
structure. For no/low gluten flour your main focus is managing acidity. You do not
has been converted, your dough will no longer have the previously wheat-like described
structure. For no/low gluten flour, your main focus is managing acidity. You do not
want the final bread to be too sour. You do not have to worry about the gluten
degradation, removing a huge headache from the equation.
@@ -54,27 +54,27 @@ degradation, removing a huge headache from the equation.
As gluten has a special role, the rest of this chapter is dedicated to having a
closer look at different gluten flours and how to distinguish them. Spelt
also contains significant amounts of gluten so the same characteristics hold
also contains significant amounts of gluten, so the same characteristics hold
true.
Several recipes call for wheat bread flour. Bread flour can refer to different types
of flour. It could be a T405 or a T550 in Germany. This is very often
wrongfully classified. The term \textit{strong or bread} flour in this case
wrongfully classified. The term \textit{strong} or \textit{bread} flour in this case
refers to the properties of the flour. A bread flour is considered to have a
higher number of protein and thus gluten. This flour is excellent when you
higher amount of protein and thus gluten. This flour is excellent when you
want to make a sourdough bread as your dough allows for a longer leavening
period. As described earlier, the gluten is consumed by your microorganisms.
The more gluten you have the longer your dough keeps its integrity. If you wanted
to make a cake you might want to use a flour with less gluten. The gluten binding
The more gluten you have, the longer your dough keeps its integrity. If you wanted
to make a cake, you might want to use a flour with less gluten. The gluten binding
properties might not be desirable since the final cake could have a chewy texture.
In conclusion not every T405, T45 or T00 flour is the same. Depending on the properties
of plant they have different properties. For that reason some countries like
In conclusion, not every T405, T45 or T00 flour is the same. Depending on the properties
of the plant, they have different properties. For that reason, some countries like
Germany have introduced additional scales to evaluate the quality of the
wheat. The category \textbf{A} refers to good quality wheat that can be blended
with poorer qualities to improve the flour. The category \textbf{B} refers to
average wheat that can be used to create different baked goods. Category \textbf{C}
is used for wheat that has poor baking qualities. This could happen for instance
is used for wheat that has poor baking qualities. This could happen, for instance,
if the wheat already started to sprout and thus lost some of its desirable
baking properties. This type of wheat is typically used as animal feed or
as fermentable biomass for generators. Category \textbf{E} refers to \textit{Elite} wheat. It's
@@ -82,17 +82,17 @@ the highest quality of wheat. This kind of wheat can be harvested when the
wheat has grown under optimal conditions. You can compare this to a winery
that uses only the best grapes to make a reserve wine. Unfortunately, this is normally never printed
on the packaging of the flour that you buy. You can look out for the protein
value as a possible indicator. However large mills blend flours together to
value as a possible indicator. However, large mills blend flours together to
maintain quality throughout the years. Blended flour is also not listed on
the packaging. It might be that bakeries extract gluten from some flour and
then mix it in order to create better baking flours.
In Italy the so called
In Italy the so-called
\textbf{W-value} has been introduced to show better how the flour will behave.
A dough is made and then the resistance of this dough to kneading is measured.
The more gluten a flour has the more elastic the dough is and the more it will
A dough is made, and then the resistance of this dough to kneading is measured.
The more gluten a flour has, the more elastic the dough is, and the more it will
resist kneading. A higher W flour will have a higher gluten content and allow for a longer
fermentation period. But at the same time it is also harder for the microbes to
fermentation period. But at the same time, it is also harder for the microbes to
inflate the dough as there is more balloon material. To make an excellent fermented
product out of a high W flour you will need to have a long fermentation period.
The long fermentation period also means that your microbes will enrich
@@ -105,28 +105,28 @@ your dough with more flavor.
\end{figure}
Generally, when aiming to
bake free standing sourdough bread aim for a higher protein content. If the
gluten value is relatively low your bread will collapse faster. Baking bread
bake freestanding sourdough bread, aim for a higher protein content. If the
gluten value is relatively low, your bread will collapse faster. Baking bread
is still possible, but it might be easier to use tools such as a loaf pan, or
to make pan or flat breads.
An additional rarely considered characteristic of good flour is the level of damage to the
An additional, rarely considered characteristic of good flour is the level of damage to the
starch molecules. This is a common problem when you are trying to mill your own wheat flours at
home. Chances are that your home mill is not able to achieve the same results
a larger mill can. The damaging of the starches is essential to improve the
properties of the dough. You will have a better gelatinization and water
absorption with properly damaged starch \cite{starch+damage+flour}. As more
starch is damaged the surface area increases. This improves how water connects with the flour.
starch is damaged, the surface area increases. This improves how water interacts with the flour.
This also provides a larger surface that your microbes can use to attack the molecules
and start the fermentation process.
I am still
yet to find a good way of milling my own flour at home. Even after trying to
mill the flour 10 times with short breaks I was not able to achieve the same
mill the flour 10 times with short breaks, I was not able to achieve the same
properties as with commercially milled flour. The doughs I would make felt
good, maybe a bit coarse. Then during baking however the doughs would start to
good, though maybe a bit coarse. Then during baking, however, the doughs would start to
degas quickly and turn into very flat breads. I have had great success though when
utilizing home milled flour together with a loaf pan or as a pan bread. If you
have found great ways to work with home milled flour please reach out. The potential
of using home milled flours is huge. It would enable even distant communities
to grow their own wheat and be able to produce amazing freshly baked bread.
utilizing home-milled flour together with a loaf pan or as a pan bread. If you
have found great ways to work with home-milled flour, please reach out. The potential
of using home-milled flours is huge. It would enable even distant communities
to grow their own wheat and be able to produce amazing freshly baked bread.

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@@ -10,18 +10,18 @@ traits.
\label{tab:starter-types-comparison}
\end{table}
Depending on the flour you have at hand the type of starter changes. With more
Depending on the flour you have at hand, the type of starter changes. With more
bacterial activity you have more gluten consumption of your microbes. So if
you want to bake a free standing loaf you need a flour with more gluten. The
more gluten you have the more of it can be broken down whilst still maintaining
you want to bake a free standing loaf, you need a flour with more gluten. The
more gluten you have, the more of it can be broken down whilst still maintaining
dough integrity. If you live in a country where the climate to grow wheat
isn't ideal and you only have weaker flours, then a stiff sourdough starter
could be advised. The stiff sourdough starter will improve yeast activity and
reduce bacterial activity. If you are a chaser of a very sour bread and have a
very strong wheat flour then you can try to play with a liquid sourdough
starter. The key difference between all of the starters is how much water
is used in the starter. The regular starter having a 1:1 relationship of flour
to water. The liquid starter has a 5:1 water to flour ratio and the stiff
is used in the starter. The regular starter has a 1:1 relationship of flour
to water. The liquid starter has a 5:1 water-to-flour ratio, and the stiff
starter has half the flour as water.
\begin{figure}[!htb]
@@ -36,28 +36,28 @@ starter has half the flour as water.
You can change your starter type by just adjusting the feeding ratio of how
much flour and water you use. I frequently changed my starter type from
regular to liquid and then back to a stiff starter. After changing the
environment of your microbes apply feedings at the same ratio over a couple of
environment of your microbes, apply feedings at the same ratio over a couple of
days so that they can adapt to the new environment. I could already see
changes after a single feeding, but I recommend 2 to 3 feedings, one feeding per
day to see a stronger effect.
day, to see a stronger effect.
Your dough is generally just a big sourdough starter. So your starter is going
to adapt and regrow inside of your main dough. But you can influence the
properties that your starter carries over to your main dough. If you have more
bacterial fermentation then your dough will also have slightly more bacterial
fermentation. If you have more yeast fermentation then your main dough will
bacterial fermentation, then your dough will also have slightly more bacterial
fermentation. If you have more yeast fermentation, then your main dough will
have slightly more yeast fermentation. This is important to know when you are
working with a more mature unfed starter. Let's say your starter had last been
fed 48 hours ago, then chances are your bacteria is very active while the
fed 48 hours ago. Chances are that your bacteria is very active while the
yeast could be dormant. In such a case you can skip feeding your starter
before making another dough. Just use a very tiny amount of starter. For 1000g
of flour I would take around 10g of starter (1 percent in terms of baker's
before making another dough. Just use a very tiny amount of starter. For 1000 g
of flour I would take around 10 g of starter (1 percent in terms of baker's
math). If my starter is very young and had just been fed 6 to 8 hours ago I might
end up going up to 20 percent of starter. Remember that your dough is nothing
else other than a big starter. It will tremendously help you to figure out
your best next steps.
When using such a low inoculation rate (1 percent) you need to use stronger
When using such a low inoculation rate (1 percent), you need to use stronger
flour when making wheat-based doughs. Your flour naturally breaks down due
to enzymatic activity. It might take 24 hours for the starter to re-grow
inside of your bread dough. At the same time, the enzymatic activity might
@@ -78,26 +78,26 @@ a longer fermentation before most gluten is broken down.
The regular sourdough starter is made at a hydration of around 100 percent.
This means the starter has equal parts of flour and water. This is the most
common and must universal sourdough starter there is. The starter has a good
balance of yeast and bacteria. After a feeding the volume increases and
increases. After it reached a certain peak it will start to collapse again.
balance of yeast and bacteria. After a feeding, the volume increases and
increases. After it reached a certain peak, it will start to collapse again.
The best way to judge whether the starter is ready is to look at signs such as
pockets on the edges of your container. Also use the nose to to evaluate the
smell of your starter. If you feel that the starter doesn't perform in a
desirable way chances are that your yeast and bacteria ratios are off. In that
case frequently daily feedings using a 1:5:5 (starter:flour:water) ratio will
desirable way, chances are that your yeast and bacteria ratios are off. In that
case frequent daily feedings using a 1:5:5 (starter:flour:water) ratio will
help.
The starter is perfect to use when utilizing stronger wheat or spelt flours.
It also nicely works with rye, emmer or einkorn. If you only have a weak flour
at hand with less gluten this starter might cause issue. As you tend to have
quite some bacterial activity gluten is going to be broken down fast. When
using the starter use around 1 to 20 percent starter based on the flour of your
at hand with less gluten, this starter might cause issues. As you tend to have
quite some bacterial activity, gluten is going to be broken down fast. When
using the starter, use around 1 to 20 percent starter based on the flour of your
dough.
Depending on the bacteria cultivated your starter either has a lactic (dairy),
a vinegary (acetic) or mix of both flavour profile. You can adjust your
starter's flavour by changing the type to a liquid starter.
Depending on the bacteria cultivated, your starter either has a lactic (dairy),
a vinegary (acetic) or mix of both flavor profile. You can adjust your
starter's flavor by changing the type to a liquid starter.
\section{Liquid starter}
\label{section:liquid-starter}
@@ -117,42 +117,42 @@ starter's flavour by changing the type to a liquid starter.
\includegraphics{figures/fig-liquid-starter-conversion.pdf}
\caption{The process to convert your regular or stiff starter into a liquid starter. The whole
process takes around 3 days. The longer you maintain your starter at the
suggested hydration level the more adapted your microorganisms become. It is recommended
suggested hydration level, the more adapted your microorganisms become. It is recommended
to keep a backup of your original starter as the liquid environment will select
an-aerobic microorganisms. This boosts bacteria that create lactic acid rather
anaerobic microorganisms. This boosts bacteria that create lactic acid rather
than acetic acid. The resulting acidity will be perceived as milder.}
\label{fig:liquid-starter-conversion}
\end{figure}
The liquid starter is made at a hydration of around 500 percent. This means
the starter has way more water than flour. The additional layer of water on
the starter has much more water than flour. The additional layer of water on
top of the flour changes the microbiome of your starter.
By introducing this layer of water less oxygen is available throughout the
By introducing this layer of water, less oxygen is available throughout the
course of fermentation. This means that your starter will no longer be
producing acetic acid. The heterofermentative lactic acid bacteria will thrive
in this environment. This is a neat little trick to change your starter's
flavour profile from vinegary to lactic. Your starter is going to develop
dairy creamy notes. Interesting when changing the hydration again your starter
flavor profile from vinegary to lactic. Your starter is going to develop
dairy creamy notes. Interestingly, when changing the hydration again, your starter
is going to maintain the liquid starter flavor profile, but then benefit again
from enhanced yeast activity. The liquid starter conversion is non reversible.
So ideally keep a backup of your starter before.
So ideally keep a backup of your stiff or regular starter.
To commence with the
conversion simply take around 1 gram of your starter, mix with 5g flour and
25g water. Stir everything together properly. After a few minutes the flour is
conversion, simply take around 1 gram of your starter, mix with 5 g flour and
25 g water. Stir everything together properly. After a few minutes the flour is
going to start settling in at the bottom of your jar. Repeat this process over
a few days. Shake the starter gently to see if you can see tiny CO2 bubbles
a few days. Shake the starter gently to see if you can see tiny CO_{2} bubbles
moving in the liquid. This is a good sign that your starter is ready. Use your
nose to smell the starter. It should have a creamy dairy flavor note.
As you have more bacterial activity this starter works best with a very strong
As you have more bacterial activity, this starter works best with a very strong
flour that can withstand a long fermentation period. Using this starter with a
weak wheat flour will not work. If you do not care about baking a free
standing loaf then you can easily use this starter together with a loaf pan.
weak wheat flour will not work. If you do not care about baking a freestanding loaf,
then you can easily use this starter together with a loaf pan.
This starter also works great when making a hearty pancake dough. To use it I
shake the starter container until I see all ingredients are homogenized. Then
I use around 5 percent of it in terms of baker's math. So for 1000g of flour
I use around 5 percent of it in terms of baker's math. So for 1000 g of flour
that's around 50 grams of liquid starter. As it is very liquid you have to
include the 50 grams in your liquid calculation. I typically treat the starter
directly as liquid in the recipes. So if the recipe calls for 600 grams of water
@@ -165,19 +165,19 @@ has a mold problem then the liquid conversion could be the remedy. Take a
piece of your starter where you suspect no mold growth. Apply the conversion
as mentioned before. The mold will likely sporulate as it runs out of food.
With each new feeding you are reducing the mold spores. The spores can no
longe reactivate as they can not do so in the anaerobic conditions.
longer reactivate as they can not do so in the anaerobic conditions.
The liquid on top of your starter is an excellent resource that you could use
to make sauces. If you feel you would like to add a little bit of acidity,
drain the liquid part on your starter and use it. I have used it numerous
times to make lactofermented hot sauces.
times to make lacto-fermented hot sauces.
\section{Stiff starter}
\label{section:stiff-starter}
\begin{figure}[!htb]
\includegraphics[width=\textwidth]{sourdough-starter-stiff.jpg}
\caption{A stiff sourdough starter that I used to make a Stollen dough for christmas. Note
\caption{A stiff sourdough starter that I used to make a Stollen dough for Christmas. Note
the bubbles on the edge of the container. The dough does not fall out of the jar.}
\label{fig:stiff-sourdough-starter}
\end{figure}
@@ -190,7 +190,7 @@ around 50 to 60 percent. So for 100 grams of flour you are using around 50 to
\includegraphics{figures/fig-stiff-starter-conversion.pdf}
\caption{The process to convert your regular starter into a stiff starter. The whole
process takes around 3 days. The longer you maintain your starter at the
suggested hydration level the more adapted your microorganisms become. The
suggested hydration level, the more adapted your microorganisms become. The
stiff starter boosts the yeast activity of your sourdough starter.
The guide uses a 50 percent hydration level for the starter. If the dough is too stiff
consider increasing this to 60 percent.}
@@ -198,29 +198,29 @@ around 50 to 60 percent. So for 100 grams of flour you are using around 50 to
\end{figure}
In the stiffer environment the yeast thrives more. This means you will have
more CO2 production and less acid production. In my tests this is a game
more CO_{2} production and less acid production. In my tests this is a game
changer especially if you are using weaker gluten flours. The wheat flours in
my home country Germany tend to be lower in gluten. For wheat to build gluten warm conditions
are preferred (SOURCE NEEDED). When following recipes from other bakers I
my home country of Germany tend to be lower in gluten. For wheat to build gluten, warm conditions
are preferred (SOURCE NEEDED). When following recipes from other bakers, I
could never achieve similar results. When following timings my doughs would
simply collapse and become super sticky. Only when I started to buy more
expensive wheat flour my results started to change. As not everyone can afford
these special baking flours and due their limited availability I stumbled upon the
expensive wheat flour did my results start to change. As not everyone can afford
these special baking flours and due their limited availability, I stumbled upon the
stiff sourdough starter. I made several tests where I used the same amount of
starter and flour. I only changed the hydration between all the starters. I
would then proceed and place a balloon on top of each of the jars. The stiff
starter jar was clearly inflated the most. On place 2 the regular starter
followed. On place three the liquid starter followed with way less CO2
starter jar was clearly inflated the most. The regular starter
followed in second place. The liquid starter finished in third place with far less CO_{2}
production.
\begin{figure}[!htb]
\includegraphics[width=\textwidth]{stollen}
\caption{A German christmas stollen made with a stiff starter instead of yeast}
\caption{A German Christmas stollen made with a stiff starter instead of yeast}
\label{fig:stollen}
\end{figure}
I then proceeded and bought a cheap low cake flour in my nearby supermarket.
This flour before had caused me massive headache before. I made a sourdough bread
This flour before had caused me massive headaches before. I made a sourdough bread
exactly how I would normally do. I had to reduce the hydration a bit as a low
gluten flour does not soak up as much water. Then I replaced the starter with
the stiff starter. The dough felt amazing and was suddenly able to withstand a
@@ -229,77 +229,77 @@ very mild. I am still yet to find a proper explanation why the yeast part of
the dough is more active. Maybe it is not. It could also be that the bacteria
is inhibited by the lack of water.
When making the stiff sourdough starter start with using around 50 percent
When making the stiff sourdough starter, start with using around 50 percent
water. If you are using a whole wheat flour, or a strong flour consider going
up to 60 percent. All the ingredients should mix together very well. There
should be no crumbly flour left. This is a common mistake I have seen when
people tried to make the stiff starter. Yes it should be dry, but not to a
point where it is a brick of cement. If you ever made a pasta dough, this is
exactly the same way how the dough should feel like.
point where it is a brick of cement. If you have ever made a pasta dough, this is
exactly the same way the stiff starter should feel.
To evaluate whether your stiff starter is ready look for a dome. Also look for
To evaluate whether your stiff starter is ready, look for a dome. Also look for
pockets of air on the edges of your container. Use your nose to smell the
starter. It should have a mild smell. It also tends to smell way more
starter. It should have a mild smell. It also tends to smell much more
alcoholic than the other starters.
When using the starter use around 1 to 20 percent depending on the ripeness of
When using the starter, use around 1 to 20 percent depending on the ripeness of
your starter. In summer times I typically use around 10 percent and in winter
times around 20 percent. This way you can also control the fermentation speed.
Mixing the starter can be a little bit annoying as it hardly homogenises with
Mixing the starter can be a little bit annoying as it hardly homogenizes with
the rest of the dough. In this case you can try to dissolve the starter in the
water you are about to use for your dough. This will make mixing a lot easier.
\section{Lievito madre or pasta madre}
The Lievito madre also known as pasta madre belongs to the same category as
the stiff sourdough starter. After conducting hours of research I could not
The lievito madre, also known as pasta madre, belongs to the same category as
the stiff sourdough starter. After conducting hours of research, I could not
find a difference in pasta madre and lievito madre. Both of terms seem to be
used interchangeably in literature.
In many recipes this starter is made directly
from dried or fresh fruits. You can make a starter also from leaves from your
garden. As described before the wild yeast and bacteria consume the glucose
from the plants leaves. All the options work. When making a starter directly
from dried fruits you sometimes lack the bacterial part of the fermentation.
garden. As described before, the wild yeast and bacteria consume the glucose
from the plants' leaves. All the options work. When making a starter directly
from dried fruits, you sometimes lack the bacterial part of the fermentation.
The acidity is very important in order to clean your starter from possible
pathogens. If you decide to make your starter from fruits make sure it also
pathogens. If you decide to make your starter from fruits, make sure it also
acidifies properly when making a dough. A tool such as a pH meter can be of
optimal help. Generally the lower the pH the higher the acidity. The acidity
optimal help. Generally, the lower the pH, the higher the acidity. The acidity
should be below 4.2 to know that your starter produces sufficient acidity.
Some bakers cleanse the lievito madre in a bath of water. This is supposed to
remove excess acidity. In my own experiments I have not been able to confirm
this methodology. The acidity remains the same. The only reason this could
make sense is if you also tried to boost anaerobic microorganisms. However then the
make sense is if you also tried to boost anaerobic microorganisms. However, then the
starter would need to remain in this environment for quite some time and not just
a few hours.
Baking with sourdough is simple. It's just flour and water. When seeing a recipe
from an experienced baker you wonder, wait, that's it? There is nothing more
to it? I feel that this might be the reason why some bakers have so complicated
from an experienced baker you wonder, Wait, that's it? There is nothing more
to it? I feel that this might be the reason why some bakers have such complicated
feeding procedures. They resort to several feedings per day at a certain given ratio.
This makes the baker feel a little more elitist. Of course over time as
more and more people follow this procedure it becomes a self fulfilling prophecy.
The more experienced you become the higher the chances are that a bogus starter
more and more people follow this procedure, it becomes a self fulfilling prophecy.
The more experienced you become, the higher the chances are that a bogus starter
feeding guide will reward you with beautiful results. The reason however is
not in the starter routine. The reason is that you better understand the fermentation
and become better at reading the signs of your dough.
If I had one starter type to choose I would go for the stiff starter. In many cases
If I had one starter type to choose, I would go for the stiff starter. In many cases
it will provide you with consistent great results with little effort.
In my experience you can make any yeast based dough and just replace
In my experience you can make any yeast-based dough and just replace
the yeast directly with the stiff sourdough starter. You will be able
to achieve even better results with the stiff starter.
Lastly no matter which starter type you choose, you can control how sour
you want your dough to be. The longer you push the fermentation the more
Lastly, no matter which starter type you choose, you can control how sour
you want your dough to be. The longer you push the fermentation, the more
acidity is going to be piled up. The only difference is that for a given
volume increase the stiff starter will produce the least acidity. So for a
volume increase of 100 percent, the liquid starter has produced most acidity,
volume increase, the stiff starter will produce the least acidity. So for a
volume increase of 100 percent, the liquid starter has produced the most acidity,
followed by the regular starter and then the stiff starter. If you wait long
enough the stiff starter will have produced the same amount of acidity as the
other starters. But before doing so it also has produced a lot more CO2. If
you like the sour flavour you have to push your fermentation longer. This also
enough, the stiff starter will have produced the same amount of acidity as the
other starters. But before doing so it will have also produced a lot more CO_{2}. If
you like the sour flavor, you have to push your fermentation longer. This also
means you either need to bake in a loaf pan or have a very strong gluten flour
that is able to withstand long fermentation times.