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Dessert

Boiled Custard

A simple custard made by heating milk, whisking egg yolks with sugar and salt, and cooking until thickened.

From an old cookbook · modernised transcription
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Why it works: Milk and nutmeg are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 14,685 recipes. Both carry eucalyptol, which smells eucalyptus, herbal. The science ↓

Boiled Custard

Ingredients

Directions

Make the custard

  1. Scald the milk in a double boiler.

  2. In a bowl, beat the egg yolks, sugar, and salt together.

  3. Slowly pour the hot milk into the egg mixture while stirring continuously.

  4. Return the mixture to the double boiler and cook until it thickens like cream and coats the spoon.

  5. Remove from the stove immediately to prevent curdling.

Finish

  1. Strain through a fine strainer and add your chosen flavor.

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 + nutmegtop 15% of all pairs
    Smell alikemoderate
    Cooked together14,685 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

  2. Egg + nutmegtop 17% of all pairs
    Smell alikelow
    Cooked together24,744 recipes

    Shared aroma: acetic acid (sour, vinegar).

  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 + nutmegtop 20% of all pairs
    Smell alikelow
    Cooked together23,364 recipes

    Shared aroma: 1-penten-3-one (fish, pungent).

Egg and nutmeg barely smell alike, yet cooks put them together in 24,744 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

Egg yolks
Thicken the custard as they set with gentle heat, giving it body and richness.
Milk
Forms the liquid base that the yolks thicken into a smooth, pourable custard.
Sugar
Sweetens the custard and helps keep the yolks from setting too quickly.

The step that matters

Return the mixture to the double boiler and cook until it thickens like cream and coats the spoon.. Egg proteins set with heat, so if the custard gets too hot it can curdle and turn grainy. Gentle, steady heat and removing it promptly keep it smooth.

Swap the nutmeg

How well each one fits the dish's main ingredients (milk, egg, sugar):

  1. Cinnamonfits better
  2. Nutmegthe original
  3. Gingerfits less well
  4. Allspicefits less well

Fit is the average pairing score against milk, egg, sugar. Candidates are from the same food group and used in at least 100 recipes.

“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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