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Dessert

Boiled Custard

A custard made by beating eggs, heating milk, and combining with sugar and vanilla.

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 ↓

Boiled Custard

Ingredients

Directions

Prepare

  1. Beat the egg yolks and whites separately.

  2. Add a small quantity of the egg whites to the yolks.

Make the custard

  1. Heat the milk until it just begins to scald.

  2. Place the remaining egg whites on top of the milk and cook slightly.

  3. Skim off the whites and gradually stir in the yolk mixture, sugar, and vanilla.

  4. Once cooked, pour the custard out quickly.

Finish

  1. When cool, place the reserved egg whites on top.

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

Eggs
Egg yolks thicken the custard as they set, giving it body and a smooth, rich texture.
Milk
Forms the liquid base of the custard, carrying the flavour and setting around the egg proteins.
Sugar
Sweetens the custard and balances the richness of the egg and milk.

The step that matters

Gradually stir in the yolk mixture. Adding hot milk to beaten yolks too quickly can scramble the eggs, leaving lumps. Blending slowly tempers the yolks so the custard thickens smoothly.

“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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