Summer Sourdough Crushed Ice & Water Temp Chart for a Hot 92 Degree (92°F / 33°C) Kitchen — Stand Mixer Knead 8-Min (78°F DDT)
4-factor Desired Dough Temperature (DDT) and 80 cal/g latent heat crushed-ice calculation for hitting 78°F dough in a hot 92°F room.
Four inputs decide the temperature of your water: the 78°F target dough, a 33.3°C room, 33.3°C flour, 33.3°C levain, and +14°F from stand mixer knead 8-min (78°f ddt). Solve 4 × 78°F − (92 + 92 + 92 + 14) and you land on 22°F (-5.6°C) of mix water in this 33.3°C (33.3°C) kitchen. The faucet supplies 78°F and the dough needs 22°F, so ice is the only route: weigh 103g of crushed ice and 247g of 78°F water for the 350g batch, exploiting 80 cal per gram of phase change.
- Required Water Temp
- 22°F (-5.6°C)To hit 78°F DDT in 92°F room
- 350g Batch Ice Split
- 103g Ice / 247g WBased on 78°F tap water & 80 cal/g latent heat
- Mixer Friction Factor
- +14°FStand Mixer Knead 8-Min
- Target Final Dough Temp
- 78°F (25.6°C)Locks fermentation clock & protease rate
Water Temperature Solver: 92°F (33.3°C) Room, Stand Mixer Knead 8-Min (78°F DDT) (+14°F)
Each row re-solves the 4-factor equation at a different batch size; the 22°F target stays constant while the ice mass scales.
| Batch Water Weight | Required Mix Temperature | Crushed Ice Weight | Liquid Water Needed | Final Dough Temperature |
|---|---|---|---|---|
| [Anchor]: 350g total water | mix at 22°F | substitute 103g ice | keep 247g warm water | friction +14°F absorbed |
| Quarter Batch: 400g total water | mix at 22°F | substitute 118g ice | keep 282g warm water | friction +14°F absorbed |
| Three-Quarter Batch: 300g total water | mix at 22°F | substitute 88g ice | keep 212g warm water | friction +14°F absorbed |
| Half Batch: 500g total water | mix at 22°F | substitute 147g ice | keep 353g warm water | friction +14°F absorbed |
| Double Batch: 250g total water | mix at 22°F | substitute 74g ice | keep 176g warm water | friction +14°F absorbed |
Interactive Desired Dough Temp (DDT) & Ice Solver Calculator
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Baking Sourdough in a Hot 92°F Room: Why You Need 22°F Water (103g Ice)
The 4-factor equation is symmetric: a room that is 2°F cooler demands 2°F more from the water, and a mixer with 2°F less friction demands 2°F less. In this 92°F (33.3 Celsius) kitchen the combined correction to 78°F is what produces the 22°F target, and the same correction scales proportionally with every additional gram of water.
Timing the correction is part of the correction. Weight the ice before the flour goes in, and mix ice and flour together first rather than adding ice to a wet dough, because the 80 cal/g latent heat only works if the ice is in contact with the water before the starch starts to hydrate.
Thermal Control Protocol for Stand Mixer Knead 8-Min (78°F DDT) in a 92°F Room
- Start the Night Before: In a 92°F (33.3 Celsius) kitchen the flour will sit near room temperature overnight if you store it sealed, so re-probe it in the morning rather than trusting yesterday's reading.
- Prepare the Water Station: Get the 22°F (-5.6°C) water ready before you open the flour bag — once the flour is wet the temperature negotiation is over.
- Blend Ice and Water: Stir 103g of crushed ice into 247g of 78°F tap water until the slush is uniform, then pour over the flour.
- Record and Repeat: Note the final probe reading alongside the 92°F (33.3 Celsius) room temperature so the next bake is a copy rather than a calculation.
Frequently Asked Questions for This Desired Dough Temp (DDT) & Ice Solver Spec
Should I probe the flour and levain separately?
Yes. The equation counts the flour and levain as 92°F each, and in a 92°F (33.3°C) kitchen a levain straight from the refrigerator can be 10°F cooler, which alone will miss the 78°F target.
How much ice do I add to 350g of bread water in a 92°F room (Stand Mixer Knead 8-Min (78°F DDT))?
Replace 103g of water with finely crushed ice and use 247g of 78°F tap water to hit 78°F DDT.
Does the type of mixer actually change the water temperature?
Yes, and that is exactly what the friction factor models. Stand Mixer Knead 8-Min (78°F DDT) contributes +14°F, so the same 92°F (33.3°C) kitchen needs a 22°F mix water for this machine and a different one for a hand-mixed dough.