Seasoned Advice Asked on April 30, 2021
I am following a recipe from the well established Italian Baker Bonci, to make my liquid sourdough starter (with some success too).
In his recipe he says to refresh the starter with a 1:1:1 proportion every day for a month before it can be considered matured and ready to use.
I would like to know what happens during these 31 days and why this time frame is needed (the starter seems very active after a week or two and is capable of leavening bread already).
My understanding /theory is that the successive rounds of feeding, souring and re feeding help grow yeasts while acidity weeds out some of them, in fact selecting the right “genes” we want to keep in our starter.
I would like to know :
Here is a small piece of the answer. https://pubmed.ncbi.nlm.nih.gov/33496265/ It is not just yeast strains but especially lactobacillus bacteria that develops and helps to change the ph of the starter. This change in ph is what helps the sourdough bread retain moisture and results in the creation of acetic and lactic acids which create the tanginess.
Answered by Punabob on April 30, 2021
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