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Sauce

Soft Custard Sauce

A creamy sauce made from milk, eggs, sugar, and vanilla, cooked until thickened.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Milk and vanilla are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 19,187 recipes. Both carry ethyl caproate, which smells fruity, apple peel. The science ↓

Soft Custard Sauce

Ingredients

Directions

  1. Heat the milk in a double boiler until it begins to boil.

  2. In a separate bowl, beat the eggs and powdered sugar together until light and creamy.

  3. Stir the egg mixture into the boiling milk.

  4. Continue stirring over heat until the sauce begins to thicken, then remove from heat.

  5. Add the vanilla and let cool.

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 + vanillatop 5% of all pairs
    Smell alikemoderate
    Cooked together19,187 recipes

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

  2. Sugar + vanillatop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

    Shared aroma: beta-damascenone (apple, rose).

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

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

  4. Milk + sugartop 18% of all pairs
    Smell alikelow
    Cooked together77,875 recipes

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

  5. Egg + sugartop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 recipes: they work on texture and structure more than aroma.

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

What each ingredient does

Milk
Forms the liquid base that the custard thickens in.
Eggs
Thicken the sauce as their proteins set with gentle heat.
Powdered sugar
Adds sweetness and dissolves easily into the beaten eggs.
Vanilla
Adds aroma and flavour to the finished sauce.

The step that matters

Stirring the egg mixture into the milk and cooking until thickened. Egg proteins set gradually when heated, so the sauce can curdle if the heat is too high or stirring stops. Keep stirring steadily and remove from heat as soon as it begins to thicken.

“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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