fact
A loaf must hold its bubbles
Gas production is only part of a bread’s rise.
A bubbling yeast cup and a rising loaf can behave differently even when yeast is active in both.
In wheat dough, a hydrated protein network helps retain gas pockets. An open liquid lets much of its gas escape. The bread’s structure therefore matters alongside yeast activity; foam height in a cup cannot directly predict loaf height.
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Behind the explanation
- Exploratorium: Bread Science 101 ↗
Baker’s yeast is a single-celled fungus that produces carbon dioxide from sugars; hydrated wheat proteins form a gluten network that can retain gas.
Version 1 · Sources checked 2026-09-25