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Whey

Whey is the liquid byproduct of curdled milk, made by boiling milk, adding acid or rennet, and draining the curds.

From an old cookbook · modernised transcription
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Whey

Why it works: Milk and lemon are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 19,053 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Whey

Ingredients

Directions

Make the curds

  1. Boil the milk in a saucepan.

  2. Add the lemon juice or rennet and stir gently.

  3. Once curds form, strain the mixture through muslin.

Strain and press

  1. Squeeze the curd to extract all the fluid.

  2. Break up the curd with your fingers while pressing to enhance nutrition.

Recipe from a historical cookbook (Internet Archive).

Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.

Photo for illustrative purposes only · Contact us to use it

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.

  1. Milk + lemontop 15% of all pairs
    Smell alikemoderate
    Cooked together19,053 recipes

    Shared aroma: 2-nonenal (fatty, green).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Milk
Its proteins coagulate into curds, leaving the watery whey to drain away.
Lemon juice or rennet
Acid or enzyme makes the milk proteins clump together into curds.

The step that matters

Add the lemon juice or rennet and stir gently. Curds form as the milk proteins clump. Stirring vigorously or too long can break the forming curds into small pieces, which makes straining slower and leaves more fine protein in the whey.

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.

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