Shelf · Dough & batter · Low heat
Blooming yeast
Stirring dry yeast into warm liquid with a pinch of sugar and waiting for it to foam before mixing the dough.
- The temperature band
- The liquid · 38 to 43 °C
- The time
- About 10 min
Why it works
It is a test, not a step — the foam is the yeast eating, and it proves the packet is alive before you commit flour to it. It also rehydrates the granules evenly, which dry yeast tossed into flour does more slowly.
The tell
A creamy foam covers the surface within five to ten minutes and the liquid smells distinctly of beer.
No ladder here: there are two states, not three — it happens or it does not — and the third rung would have to be invented.
How it fails
Liquid hot enough to feel properly hot on the wrist kills the yeast outright and nothing foams — warm, like a baby’s bath, is the target. No foam after ten minutes means dead yeast: throw it out and start again, because no amount of proofing will save that dough.
In the app, the card opens on the recipe step that names it, with the tell drawn.
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