Temperature × recipe
Sourdough Panettone at 88–95°F
Adjusted timing: 1.2h bulk + 3.9h proof (multiplier 0.39×).
- Baseline bulk (76°F)
- 3h
- Adjusted bulk
- 1.2h
- Baseline proof
- 10h
- Adjusted proof
- 3.9h
- Multiplier
- 0.39×
- Activity
- extreme-mold-risk
- Target hydration
- 50%
- Bake temp
- 330°F
Why the timing shifts
Very hot — avoid. Mold risk rises sharply above 85°F. Fermentation outpaces structural development. Levain becomes unbalanced toward lactic acid producers, creating cloying sour flavor. Only use briefly for refreshing starters or if absolutely unavoidable. Move dough to cooler location, or skip this bake and wait for cooler conditions. If baking must happen, reduce levain to 8%, bulk 90 min max, get into refrigerator immediately after shaping.
Technique for Sourdough Panettone
Stage 1 dough: flour, water, levain, sugar, egg yolks — develop gluten in mixer 15 min, let ferment 8h. Stage 2: add butter gradually, then candied fruit, raisins, vanilla, zests. Additional 10 min mixing. Short 3h bulk. Shape into ball, place in panettone mold. Proof 10-12h until dome rises 1 inch above rim. Cut cross in top with butter, bake 330°F for 50-55 min until internal 208°F. Immediately invert, cool hanging upside-down for 4+ hours (prevents compression).
Calculator pre-set to these values
- Multiplier at 92°F
- 0.39×
- Adjusted bulk ferment
- 1.2 h
- Adjusted final proof
- 3.9 h
How the math works
Multipliers are piecewise-linear interpolations between reference points measured by Myhrvold et al. in Modernist Bread vol 3. 76°F is the baseline (1.0×); every 10°F drop roughly doubles fermentation time, and every 10°F rise roughly halves it.