diff --git a/book/sourdough-starter/sourdough-starter-microbial-war-i.jpg b/book/sourdough-starter/sourdough-starter-microbial-war-i.jpg new file mode 100644 index 0000000..8d608bc Binary files /dev/null and b/book/sourdough-starter/sourdough-starter-microbial-war-i.jpg differ diff --git a/book/sourdough-starter/sourdough-starter-microbial-war-ii.jpg b/book/sourdough-starter/sourdough-starter-microbial-war-ii.jpg new file mode 100644 index 0000000..7dc7f16 Binary files /dev/null and b/book/sourdough-starter/sourdough-starter-microbial-war-ii.jpg differ diff --git a/book/sourdough-starter/sourdough-starter.tex b/book/sourdough-starter/sourdough-starter.tex index 0c977b8..2aafdd1 100644 --- a/book/sourdough-starter/sourdough-starter.tex +++ b/book/sourdough-starter/sourdough-starter.tex @@ -1,6 +1,15 @@ \chapter{Making a sourdough starter}% \label{chapter:sourdough-starter} \begin{quoting} + +\begin{figure}[!htb] + \centering + \includegraphics[width=\textwidth]{sourdough-starter-activity-indicators} + \caption[Very active sourdough]{A very active sourdough starter shown by the + bubbles in the dough.}% + \label{fig:sourdough-starter} +\end{figure} + In this chapter you will learn how to make your own sourdough starter, but before doing so you will quickly learn about baker's math. Don't worry, @@ -12,6 +21,8 @@ your starter's readiness, as well as how to prepare your starter for long-term storage. \end{quoting} +%\iffalse + \section{Baker's math}% \label{section:bakers-math} @@ -80,20 +91,23 @@ hungry family arrives. You are tasked with making pasta for \num{20} people. How would you calculate the amount of sauce you need? You go to the internet and check a recipe and then are completely lost when trying to scale it up. +% \fi \section{The process of making a starter} -\begin{figure}[!htb] - \centering - \includegraphics[width=\textwidth]{sourdough-starter-activity-indicators} - \caption[Very active sourdough]{A very active sourdough starter shown by the - bubbles in the dough.}% - \label{fig:sourdough-starter} -\end{figure} - Making a sourdough starter is very easy, all you need is a little bit of patience. It is in fact so easy that it can be summarized -in a simple flowchart~\ref{fig:sourdough-starter-process} The flour you should +in a simple flowchart~\ref{fig:sourdough-starter-process}. + +\begin{flowchart}[!htb] +\centering + \input{figures/fig-starter-process.tex} + \caption[The full sourdough starter process]{The process of making a sourdough + starter from scratch.}% + \label{fig:sourdough-starter-process} +\end{flowchart} + +The flour you should use to bootstrap your starter is ideally a whole flour. You could use whole-wheat, whole-rye, whole-spelt or any other flour you have. In fact gluten free flours such @@ -131,14 +145,6 @@ not airtight. You still want some gas exchange to be possible. I~like to use a glass and place another inverted one on top. -\begin{flowchart}[!htb] -\centering - \input{figures/fig-starter-process.tex} - \caption[The full sourdough starter process]{The process of making a sourdough - starter from scratch.}% - \label{fig:sourdough-starter-process} -\end{flowchart} - Now an epic battle begins. In one study~\cite{yeasts+biocontrol+agent} scientists have identified more than \num{150}~different yeast species living on a single leaf of a plant. @@ -147,6 +153,14 @@ the upper hand in this battle. Other pathogens such as mold are also being activated as we added water. Only the strongest most adaptable microorganisms will survive. +\begin{figure}[!htb] + \includegraphics[width=\textwidth]{sourdough-starter-microbial-war-i} + \caption[Microbial warfare during sourdough early days]{A simple + visualization of the microbial warfare that happens during the early days of making of + a sourdough starter.} + \label{fig:sourdough-starter-microbial-war-i} +\end{figure} + By adding water to the flour the starches start to degrade. The seedling tries to sprout but it no longer can. Essential for this process is the @@ -188,20 +202,6 @@ days my new starter seems to be quite alive already. This might be due to previous contamination of flour fermenting microbes in my kitchen. -\begin{figure}[!htb] - \includegraphics[width=\textwidth]{sourdough-starter-microbial-war} - \caption[Microbial warfare during sourdough early days]{A simple - visualization of the microbial warfare that happens during the making of - a sourdough starter. The wild spores on the plant and flour become - activated the moment flour and water is mixed. Only the most adapted - flour-fermenting microbes will survive. Because of unwanted microbial - fermentation it is advised to discard the feeding-leftovers of the first - days. The surviving yeast and bacteria continuously try to outcompete - each other for resources. New microbes have a hard time entering the - starter and are eliminated.}% - \label{fig:sourdough-starter-microbial-war} -\end{figure} - Wait for around 24~hours and observe what happens to your starter. You might see some early signs of fermentation already. Use your nose to smell the dough. Look for bubbles in the dough. Your dough @@ -252,6 +252,14 @@ great option if the starter was accidentally depleted. A practical approach is to store all discard in a single jar in the fridge, adding new discard on top as needed and using it whenever required.} +\begin{figure}[!htb] + \includegraphics[width=\textwidth]{sourdough-starter-microbial-war-ii} + \caption[Microbial warfare during sourdough later days]{A simple + visualization of the microbial warfare that happens during the later days of making of + a sourdough starter.} + \label{fig:sourdough-starter-microbial-war-ii} +\end{figure} + You should hopefully again see some bubbles, the starter increasing in size and/or the starter changing its smell. Some people give up after the second or third day, because the signs might no longer