Proofing
Proofing is the final rise of yeasted dough after it's been shaped and before it goes into the oven. During proofing, yeast keeps producing carbon dioxide, inflating the gas bubbles trapped in the gluten so the loaf becomes light enough to bake.
Proofing vs other rises
Bread dough usually rises twice:
- Bulk fermentation (first rise). The whole batch ferments together, building flavour and gluten strength.
- Proofing (final rise, also called final proof). The dough is shaped, then left to expand one last time.
"Proofing yeast" can also mean blooming active dry yeast in warm water to check that it's alive. Same word, different job (see blooming).
What's happening in the dough
Yeast eats sugars and releases carbon dioxide and alcohol. Gluten traps the gas in thousands of tiny bubbles. Shaping tightened the dough's surface, so as those bubbles grow, the loaf rises upward instead of slumping.
Proofing too long exhausts the yeast's food and stretches gluten until it's thin and weak. Proofing too short leaves the dough tight, so it tears and bursts in the oven.
Temperature and time
| Conditions | Typical proof time (shaped loaf) |
|---|---|
| Warm, 27–29 °C (80–85 °F) | 30–60 minutes |
| Ideal, 24–27 °C (75–80 °F) | 45–90 minutes |
| Cool kitchen, 20 °C (68 °F) | 1½–3 hours |
| Fridge, 4 °C (39 °F) | 8–48 hours |
Sourdough proofs more slowly than commercial yeast dough. Enriched doughs with lots of butter, sugar, or eggs also rise more slowly.
The poke test
Flour a finger and press about 1 cm (½ in) into the side of the dough.
- Springs back fast and fully: under-proofed. Wait longer.
- Springs back slowly and leaves a small dent: ready to bake.
- Stays dented or the dough sighs and deflates: over-proofed.
Signs and fixes
Under-proofed: dense crumb, a tight loaf that bursts along the side, sometimes a big tunnel under the crust. Give it more time next bake.
Over-proofed: flat loaf, poor oven spring, sour or boozy smell, coarse holes. For yeasted doughs, you can often gently reshape and proof again for a shorter time. Over-proofed sourdough is harder to rescue; consider baking it in a loaf pan.
Easy proofing setups
- An oven with only the light switched on, usually around 27–32 °C (80–90 °F). Check it with a thermometer.
- An oven or microwave with a mug of just-boiled water inside for humidity.
- Covering dough with an upturned bowl or plastic wrap to stop the surface drying and forming a skin.
Questions
What is the difference between bulk fermentation and proofing?
Bulk fermentation is the first rise, when the whole batch of dough ferments together and develops flavour and strength. Proofing is the final rise after the dough is divided and shaped.
What is the best temperature for proofing dough?
Most yeast doughs proof well at 24–27 °C (75–80 °F) with some humidity. Cooler temperatures work but take longer and build more flavour.
How do I know if my dough is over-proofed?
When poked, over-proofed dough stays dented and doesn't spring back, and it may smell boozy or look slack and bubbly on top. In the oven it spreads, collapses, or bakes flat with large holes under the crust.
Can you proof dough in the fridge?
Yes. This is called retarding. At around 4 °C (39 °F), dough proofs very slowly over 8–48 hours, which deepens flavour and lets you bake on your schedule.