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Renter Whey

A process to coagulate milk into curd and clarify whey using rennet, egg white, and tartaric acid.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Milk and egg are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 88,785 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Renter Whey

Ingredients

Directions

Make the curd

  1. Heat the milk in a basin surrounded by boiling water until it is warm.

  2. Mix in the rennet and remove from the warm water.

  3. Allow the milk to coagulate completely.

  4. Break down the curd and strain the whey to separate it from the curd.

Clarify the whey

  1. Whisk the egg white, whey, and tartaric acid together to clarify.

  2. Heat the mixture until it begins to boil to complete coagulation.

  3. Pour off the clear whey.

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.

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 + eggtop 18% of all pairs
    Smell alikemoderate
    Cooked together88,785 recipes

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

  2. Milk + wheytop 20% of all pairs
    Smell alikelow
    Cooked together63 recipes

    Shared aroma: ethyl caproate (fruity, apple peel).

  3. Egg + wheytop 25% of all pairs
    Smell alikemoderate
    Cooked together38 recipes

    Shared aroma: 1-octen-3-ol (mushroom, earthy).

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

What each ingredient does

Milk
Provides the protein that the rennet coagulates into a curd.
Rennet
Enzyme that sets the milk into a curd, separating it from the liquid whey.
Egg white
Coagulates when heated and traps particles, clarifying the whey.

The step that matters

Heating the mixture to coagulate the clarifying solids. Egg white must be heated until it begins to boil so it coagulates fully and traps impurities. If it is heated too gently or stirred too hard, the particles will not gather and the whey stays cloudy.

“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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