Amarabosch — baking sourdough bread at home | amarabosch.com
Fermentation time is the main lever on both sourness and keeping quality: the longer the ferment, the more lactic acid builds up.
The fermentation process produces lactic acid, which gives the bread its distinctive sour taste. The same fermentation improves the bread's keeping qualities, because the acid environment is hostile to spoilage organisms.
A short ferment of roughly 12 to 24 hours gives a mild tang and a tender crumb. A long ferment of 36 to 48 hours deepens the sour note and extends how long the loaf stays fresh.
On narrow screens, swipe or scroll the plate sideways.
The trade-off is dough strength. Past a point the acid begins to break down gluten, so an over-fermented dough spreads instead of holding its shape.
Temperature shifts the whole timeline. A warm kitchen shortens the window; a cool one stretches it. The table on the main page maps practical windows against flavor and keeping quality.
For a first bake, aim for the middle of the range — around 24 hours — where the dough is still easy to handle and the flavor is clearly sour.
Further reading