Proofing is the final rise before baking — the last chance for the shaped loaf to fill with gas before it hits the oven. Get it right and the loaf springs upward, scores open cleanly, and bakes with an open, airy crumb. Get it wrong and even a perfectly shaped loaf will bake flat, dense, or gummy.
What proofing actually is
Proofing — the final proof — is the rise that happens after shaping and before baking. The shaped loaf sits in its banneton while the wild yeast produces carbon dioxide, inflating the dough one last time. It is easy to confuse with bulk fermentation, but they are different stages.
Because most of the fermentation work happens during bulk, the final proof is usually much shorter. If bulk was taken far enough, the loaf only needs a modest final rise; if bulk was cut short, the proof carries more of the load and runs longer.
How long does proofing take?
There is no single number, because proof time depends on temperature, starter strength, hydration, and how far bulk was pushed. Temperature is the biggest lever — fermentation roughly doubles in speed for every 8–10°C rise.
Treat clock times as starting points, not rules — always confirm with the dough itself.
The poke test
The poke test is the most reliable way to judge proof, because it reads the actual state of the dough rather than the clock. Press a floured finger about 1 cm into the side of the shaped loaf and watch the dent recover:
Combine it with a visual check: a ready loaf looks noticeably puffed, has grown by roughly 30–50%, and jiggles slightly when the basket is nudged. For the full method — where to poke, how it reads during bulk versus the final proof, and how to use it on any bread dough — see the dedicated sourdough poke test guide.
Cold proofing (retarding)
Cold proofing — also called retarding — means moving the shaped loaf into the fridge for its final proof instead of leaving it on the counter. It is optional, but many bakers use it every bake for three reasons.
To cold proof: shape the loaf, place it seam-side up in a floured banneton, cover it (a bag or shower cap works), and refrigerate. Most bakers bake straight from the fridge — no need to warm the loaf first, which also keeps the surface firm for scoring.
Underproofed vs overproofed
Reading the two failure modes helps you correct course. When in doubt, err slightly toward underproofing — a slightly underproofed loaf still springs and bakes well; an overproofed one rarely recovers.
Proofing and the rest of the process
Proofing sits at the end of a chain and depends on everything before it. If bulk fermentation was taken to the right point and the loaf was shaped with good tension, the final proof is short and predictable. If bulk ran short or long, the proof has to compensate and becomes much harder to judge.
Hydration matters too: wetter doughs spread faster and can look overproofed sooner. If your loaves proof unevenly or spread flat, use the hydration calculator to dial in a slightly firmer dough next time.
Try the calculatorNail bulk timing for your dough temperature and starter percentage — the proof gets easy from there.