A reusable guide for baking sourdough with the proof setting on the oven. Works with any Gina recipe that calls for a bulk rise — Classic Boule, Italian, Country Wheat, Honey Oat, all of them.
What the proof setting actually does
It holds the oven at about 100°F — warmer than the kitchen, warm enough to speed up yeast without cooking the dough. It's a controlled, gentle warm box.
When to use it (and when not to)
| Step | Use proof setting? | Why |
|---|---|---|
| Bulk rise (before shaping) | YES | The proof setting was designed for this. Cuts the rise from ~1 hour to ~45 min. |
| Cold retard (overnight) | NO | The slow cold develops flavor. Heat ruins it. Always the fridge. |
| Feeding the starter | NO | Sourdough Home at 73°F already does this. Don't stack heat. |
| Final proof | NO | The cold retard IS the final proof. No second rise. |
So really: proof setting = bulk rise, and only the bulk rise.
The bulk rise, step by step
This replaces step 11 in Classic Boule (and the equivalent step in every other recipe — usually called "Bulk rise" or "Bulk ferment").
- After your last fold, leave the dough in the covered bowl
- Turn the oven to proof (~100°F)
- Place the covered bowl in the oven
- Set a 45-minute timer
What you're looking for
Open the oven at 45 min and check for these three things:
- [ ] 50% growth — the dough is half again as big as when you put it in (not doubled)
- [ ] Domed top — it's pushed up, slightly rounded
- [ ] Puffy and bubbly — small bubbles visible on top or sides
If all three are there, pull it out and shape immediately. If not all three, give it 5–10 more minutes and check again.
Critical rule: never go past doubled
Doubled = over-proofed. The dough is exhausted before it gets in the oven and won't spring properly. You'll get a flat, dense loaf.
If you see doubled, shape and bake right away — you might still save it. But next time, set a shorter timer.
Recipe-specific timing
Different recipes ferment at different speeds. These are starting points — your kitchen and your starter will vary.
| Recipe | Standard bulk rise | With proof setting | Notes |
|---|---|---|---|
| Classic Boule | 1 hour | ~45 min | The baseline |
| Italian | 1 hour | ~45 min | Olive oil makes it look glossy — don't worry |
| Country Wheat | 45–60 min | ~35–40 min | Wheat ferments faster, watch closely |
| Honey Oat | 75–90 min | ~50–60 min | Enriched dough is slower |
| Daily Loaf | 4–6 hours | Not recommended | Too long for proof setting; use counter |
Adjustments by season
The proof setting is consistent year-round, which is its whole point. But the dough entering it isn't.
- Winter: Dough comes from a cool kitchen. May need an extra 5–10 min.
- Summer: Dough comes from a warm kitchen. May be ready in 35–40 min.
Always watch the dough, not the clock. The dough is the truth. The timer is a guess.
When the proof setting fails you
| Problem | Likely cause | Fix |
|---|---|---|
| Dough hardly rose in 45 min | Starter wasn't at peak when you mixed | Feed the starter earlier next time; only mix when it floats |
| Dough doubled before 30 min | Proof setting runs hotter than 100°F | Test oven with a thermometer; reduce timer |
| Dough rose then collapsed | Over-proofed, gluten broke | Shorter timer next time; shape sooner |
| Dough smells boozy/sharp | Over-fermented | Same — shorter timer, watch closely |
The honest version
The proof setting is a tool, not magic. It speeds up the bulk rise so you don't have to plan a full day around a slow kitchen. It does not replace:
- Watching the dough
- Knowing what 50% growth looks like
- Trusting your starter when it's ready
If you only learn one thing from this guide: the timer is a suggestion, the dough is the truth.
Quick reference card
For any Lean Master or Italian dough:
- Mix → autolyse → salt → 4 folds (30 min apart)
- Turn oven to proof
- Covered bowl into oven
- Timer: 45 min
- Check at 45 — 50% growth, domed, bubbly
- Shape immediately when ready
- Banneton → fridge for cold retard (10–14 hr)
- Bake from cold the next day
That's it. Print this. Stick it inside a cabinet door.