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Boiled Custard

A simple custard made by whisking eggs with sugar and salt, then gently cooking with milk and flavoring.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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

Oven, in the book's wordsA moderate oven

Ingredients

Directions

Prepare the custard

  1. Beat the yolks of the eggs with salt and sugar in a bowl.

  2. In a saucepan, heat the milk until it reaches boiling point.

  3. Pour the boiling milk into the egg mixture, stirring constantly.

  4. Return the mixture to the saucepan and cook for 4 minutes, stirring slowly.

  5. Avoid overcooking or undercooking to prevent an eggy taste or curdled appearance.

Finish

  1. Once done, flavor with your choice of essence.

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. Egg + milktop 18% of all pairs
    Smell alikemoderate
    Cooked together88,785 recipes

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

  4. Sugar + milktop 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
Yolks thicken the custard as they set with gentle heat, giving it body.
Milk
Forms the liquid base of the custard, carrying the flavor and setting with the egg yolks.
Sugar
Adds sweetness and balances the savory notes of the egg yolks.

The step that matters

Return the mixture to the saucepan and cook for 4 minutes, stirring slowly. Egg proteins set with gentle heat but curdle if overheated, so the custard must be cooked just until it thickens while stirred steadily.

“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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