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America's Test Kitchen · 12:00

Yogurt: five hours or ten

Hold 110–115°F. Time is the sour dial.

Yogurt: five hours or ten

Why this is on a cheese atlas

Dan holds milk in the bacteria happy zone. Streptococcus thermophilus and Lactobacillus bulgaricus take turns. Five hours is mild. Ten hours is sharper. Same milk. Different clock. That is fermentation you can taste without inventing a cave.

Taleggio’s specification uses that same pair as a vat inoculum, then salt, a square mould, and at least 35 days of a washed rind. Yogurt stops at the gel. Cheese keeps going. Do not copy a yogurt clock onto a bloomy disc and call it affinage.

The useful transfer is the log, not the recipe. Write temperature of the mass, not the room. Write hours. Write how sour you wanted. The fermentation note on this site asks for a control: change one variable. ATK already did the demo — time in, sourness out — with the heat held still.

110–115°F is about 43–46°C. That is a thermophilic room, closer to a cooked-curd vat than to a mesophilic cheddar set. If you take one number from this film into cheese, take that: the crew you hired has a preferred room. Miss it and the acid curve walks off.

Note: what to record·Note: temperature·Taleggio