Summer Sourdough Crushed Ice & Water Temp Chart for a Hot 78 Degree (78°F / 26°C) Kitchen — Stand Mixer Low Speed (75°F DDT)
4-factor Desired Dough Temperature (DDT) and 80 cal/g latent heat crushed-ice calculation for hitting 75°F dough in a hot 78°F room.
If you mix with 74°F tap water in a 25.6°C (25.6°C) kitchen using stand mixer low speed (75°f ddt), the dough will land well above 75°F and ferment far too fast. The arithmetic 4 × 75°F − (78 + 78 + 78 + 8) gives the required 58°F (14.4°C) mix temperature instead. Your 74°F tap water is 16°F too warm for a 75°F dough, so 30g of crushed ice replaces that much of the 350g and 320g of tap water completes the mix.
- Required Water Temp
- 58°F (14.4°C)To hit 75°F DDT in 78°F room
- 350g Batch Ice Split
- 30g Ice / 320g WBased on 74°F tap water & 80 cal/g latent heat
- Mixer Friction Factor
- +8°FStand Mixer Low Speed
- Target Final Dough Temp
- 75°F (23.9°C)Locks fermentation clock & protease rate
Batch-Scaled Ice & Water Chart for a 78°F Kitchen (Stand Mixer Low Speed (75°F DDT))
Each row re-solves the 4-factor equation at a different batch size; the 58°F target stays constant while the ice mass scales.
| Batch Water Weight | Required Mix Temperature | Crushed Ice Weight | Liquid Water Needed | Final Dough Temperature |
|---|---|---|---|---|
| Batch 400g [Exact Target] | target 58°F / 14.4°C | ice 34g | liquid 366g | lands on 75°F |
| Batch 350g Alt Line A | target 58°F / 14.4°C | ice 30g | liquid 320g | lands on 75°F |
| Batch 250g Alt Line B | target 58°F / 14.4°C | ice 22g | liquid 228g | lands on 75°F |
| Batch 500g Alt Line C | target 58°F / 14.4°C | ice 43g | liquid 457g | lands on 75°F |
| Batch 300g Alt Line D | target 58°F / 14.4°C | ice 26g | liquid 274g | lands on 75°F |
Live Parameter Solver for Summer Sourdough Crushed Ice & Water Temp
Dial in custom baker's percentages and export your adjusted 58°F (14.4°C) formula for bake day.
Baking Sourdough in a Hot 78°F Room: Why You Need 58°F Water (30g Ice)
Latent heat of fusion is why the cooling arithmetic is not linear. Replacing 30g of the 350g of water with crushed ice removes not merely 30g × 1 cal/g of sensible heat, but 30g × 80 cal/g of phase-change heat, which is what allows a 78 degrees (25.6°C) room to be cooled into a 75°F dough.
Probe the ingredients, not the plan. Room, flour and levain each carry their own temperature in a 25.6°C (78°F) kitchen, and the 58°F (14.4°C) figure above assumes all three are at 78°F. A 3°F error in the flour alone shifts the finished dough by roughly 1°F.
Thermal Control Protocol for Stand Mixer Low Speed (75°F DDT) in a 78°F Room
- Account for the Friction First: Stand Mixer Low Speed (75°F DDT) adds +8°F, so subtract it from your target before you calculate the water temperature — that single step is what distinguishes a 75°F dough from a warm one.
- Solve the 4-Factor Equation: 4 × 75°F − (78 + 78 + 78 + 8) = 58°F of mix water for this 78°F (25.6°C) room.
- Execute the Ice Swap: Replace 30g of the 350g with finely crushed ice and keep 320g of 74°F faucet water, melting the ice fully first.
- Probe the Finished Dough: The reading should be 75°F ± 1°F; anything else means one of the three probed ingredients was off.
Cereal Chemistry & Bench Execution FAQs
Why does my dough come out warmer than 75°F in a 78°F room?
Almost always the friction term. If you used 74°F faucet water instead of 58°F, the 8°F that stand mixer low speed (75°f ddt) generates has nowhere to go, and the finished dough overshoots the target.
How much ice do I add to 350g of bread water in a 78 deg F room (Stand Mixer Low Speed (75°F DDT))?
Replace 30g of water with finely crushed ice and use 320g of 74°F tap water to hit 75°F DDT.
What is the DDT formula for a 78°F kitchen using Stand Mixer Low Speed?
Target water temperature = (4 × 75°F) − (78°F room + 78°F flour + 78°F levain + 8°F friction) = 58°F (14.4°C).