Proofing Yeast & Bread Doneness
Updated August 15, 2026
To proof yeast, dissolve it in 105–110°F water with a pinch of sugar: foamy and fragrant within 10 minutes means it's alive; nothing means new yeast. Bread is done at an internal 190–195°F for soft sandwich loaves and 200–210°F for crusty, lean breads.
| Checkpoint | Number | Note |
|---|---|---|
| Water for proofing yeast | 105–110°F | Above 130°F kills it; cool just runs slow |
| Dough rise ("doubled") | 60–90 min at ~75°F | Watch the dough, not the clock |
| Poke test | Indent springs back slowly | Fast = underproofed; collapse = over |
| Soft/enriched loaves done | 190–195°F internal | Sandwich bread, rolls, brioche |
| Lean/crusty loaves done | 200–210°F internal | Baguettes, sourdough, boules |
| The thump | Hollow sound on the bottom | The pre-thermometer test — still works |
Proofing is a liveness test, not a ritual
Modern instant yeast is reliable enough to add straight to flour — "proofing" survives because it catches the one failure that ruins three hours of work: dead yeast. It costs ten minutes and a pinch of sugar. The killer is heat: water above 130°F cooks the yeast, so err cool — comfortable-bath warm on the wrist. Cool water doesn't kill anything; it just slows the schedule (and slow, cold rises taste better anyway, which is the entire logic of overnight refrigerator doughs).
Doneness: the crumb sets late
Golden crust lies — color arrives before the center finishes, which is how gummy loaves happen. A thermometer through the bottom into the center settles it: 190s for soft loaves, 200s for crusty ones. Then the hard part: most breads need to cool at least an hour before slicing, because the interior is still setting as steam redistributes. Cutting hot bread gums the crumb you waited all day for.
Quick answers
- What temperature should water be for yeast?
- 105–110°F — warm, not hot, on the wrist. 130°F+ kills yeast; when unsure, go cooler and wait longer.
- What temperature is bread done?
- 190–195°F internal for soft/enriched loaves, 200–210°F for lean crusty breads. Probe through the bottom to hide the hole.
- My dough didn't rise — can I save it?
- If the yeast was dead, no; proof a fresh packet in some warm water, knead it in with a little flour, and give it another chance. If the kitchen was just cold, give it more time somewhere warmer.