When it goes wrong · Proof
It rose beautifully, then collapsed in the oven into a dense slab.
Can you save it?
Reviewed for this symptom
Baked, it is what it is — slice it thin, toast it, or cube it for croutons. Dough not yet baked that looks slack and smells strongly of alcohol can be knocked back, reshaped and proofed again, a little less lively.
How to confirm the diagnosis
Observable cues, not inferred user state
- It collapsed in the oven
- The dent stayed and the dough sighed
- A strong alcohol smell before baking
Not this?
- The dough barely moved after hours.
- Huge irregular holes and a pale, tight crumb underneath.
- A dry skin formed on top and it baked with a crust through the middle.
What actually happened
Only this symptom
Over-proofed. The gluten was stretched past its limit and had nothing left to hold the oven spring.
The full mechanism
Shared by every proof failure
Yeast consumes sugars and produces carbon dioxide and ethanol. The gas cannot escape a properly kneaded dough because the gluten network is elastic and gas-tight, so it inflates thousands of tiny pockets and the dough expands. Two things govern the rate: temperature and food. Yeast works fastest around 25-30°C and slows sharply when cold, which is what a refrigerated overnight rise exploits — the slow fermentation produces more flavour compounds relative to gas. Enriched doughs, with sugar, butter and egg, rise more slowly rather than faster: sugar competes with the yeast for water and fat coats the gluten, so expect close to double the time a lean dough takes. Over-proofing is a real failure and not just excess: the gluten stretches past what it can hold, and the structure collapses in the oven.
The full Proof lesson — how to tell, where to practise it, what it carries to.
Next time
Prevent this specific failure
Use the finger dent test and bake when the dent fills back slowly, not when it stays.
What right looks like
Shared by every proof failure
- The finger dent test is the reliable one. Press a floured finger about a centimetre in — if it springs back fully it needs longer, if it fills in slowly and leaves a soft mark it is ready, if it stays fully dented and sighs it has gone too far.
- Roughly doubled in volume, judged by eye against the container rather than by the clock.
- The surface goes from matte and slack to domed and slightly taut.
- It smells faintly of beer and bread rather than of raw flour.