Temperature measurement

Temperature measurement is a probe in the mass, not a guess from the wall thermostat. Two jobs share the instrument and must not share the rule.

Bakery process #

Desired dough temperature is the dough when mixing ends. King Arthur’s practical range for wheat yeast dough, including their wheat sourdoughs, is near 75–78 °F after mixing ¹. That is workshop consensus, not cereal science and not a pathogen limit. Water temperature is the lever you still have; flour and room are measured inputs. Friction is measured on your mixer ².

Probe the dough, not the bowl wall. King Arthur’s too-hot trial (dough around 94 °F) raced, then collapsed, with a bitter acidic crumb ¹. Details: Desired dough temperature. Fermentation then runs from that starting condition.

Perishable food safety #

USDA FSIS: bacteria such as Salmonella and E. coli grow most rapidly between 40 °F and 140 °F, doubling in as little as 20 minutes; never leave food out of refrigeration more than 2 hours (1 hour if the air is above 90 °F). Keep hot food at or above 140 °F, cold food at or below 40 °F; leftovers into shallow containers and the refrigerator within that two-hour window; reheat leftovers to 165 °F ³.

That clock is for meat, poultry, cooked leftovers, and picnic food. It is not dough DDT. A bulk ferment at 76 °F is not a roast turkey in the danger zone. Food safety is the hub; Heat transfer is how heat arrives.

Calibrate cheap thermometers in ice water and in a proper boil at your altitude. A lying probe makes both jobs wrong. Weighing is the sibling habit.