\begin{tikzpicture}[node distance = 3cm, auto]
  \node [start] (init) {Mix ingredients};
  \node [block, below of=init, node distance=3cm] (bulk_ferment) {Bulk ferment};
  \node [block, right of=init, node distance=3cm] (divide) {Divide};
  \node [block, below of=divide, node distance=3cm] (shape) {Shape};
  \node [block, right of=divide, node distance=3cm] (proof) {Proof};
  \node [success, below of=proof, node distance=3cm] (bake) {Bake};
  \path [line] (init) -- (bulk_ferment);
  \path [line] (bulk_ferment) -- (divide);
  \path [line] (divide) -- (shape);
  \path [line] (shape) -- (proof);
  \path [line] (proof) -- (bake);
\end{tikzpicture}