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Dessert

Soft-boiled Custard

A custard made by cooking milk with vanilla, sugar, and eggs, then cooling and serving with egg whites and sponge cake.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 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-boiled Custard

Ingredients

Directions

Prepare

  1. In a double boiler, heat the milk with the vanilla bean and sugar until boiling.

  2. Beat the egg whites until stiff, then add the granulated sugar.

Make the custard

  1. Drop spoonfuls of the egg whites into the boiling milk, turning them for a few seconds until cooked.

  2. Drain the egg whites and return the milk to the saucepan.

  3. Beat the egg yolks to a light cream, then gradually mix in the hot milk.

  4. Pour the custard back into the boiler and stir vigorously until thickened and smooth.

Finish and serve

  1. Remove from heat, pour into a bowl, add a little salt, and let cool.

  2. Chill in the ice, then serve in a glass bowl topped with the egg whites and sponge cake.

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. Vanilla + sugartop 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. Sugar + eggtop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

Vanilla and sugar 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 yolks thicken into a smooth custard.
Egg yolks
Their proteins set when heated, thickening the milk into a custard.
Egg whites
Whipped into stiff foam, they add lightness and form the floating topping.
Granulated sugar
Adds sweetness and helps stabilise the whipped egg whites.
Vanilla bean
Infuses the milk with its aroma as it heats.

The step that matters

Stir the custard until thickened. Egg yolk proteins set when heated, so the custard can curdle or scramble if it gets too hot or is not stirred. Stirring steadily keeps the heat even and the texture smooth.

“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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