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Dessert

Soft Custard

A custard made with milk, sugar, egg yolks, lemon rind, and optional vanilla.

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

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

Ingredients

Directions

Make the custard

  1. Scald the milk with the lemon rind.

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

  3. Gradually pour the hot milk into the yolk mixture while stirring.

  4. Strain the mixture into a double boiler and cook until slightly thickened.

Cool and flavour

  1. Remove from the double boiler and cool.

  2. If using vanilla, add it when the custard is cold and omit the lemon rind.

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.

Photo for illustrative purposes only · Contact us to use it

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. Vanilla + lemontop 15% of all pairs
    Smell alikemoderate
    Cooked together5,961 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

  4. Milk + lemontop 15% of all pairs
    Smell alikemoderate
    Cooked together19,053 recipes

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

  5. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 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

Egg yolks
Proteins set as they heat, thickening the custard into a smooth, creamy texture.
Milk
Forms the liquid base of the custard, giving it body and a rich, creamy mouthfeel.
Sugar
Adds sweetness and balances the richness of the egg yolks and milk.

The step that matters

Cook the custard gently until slightly thickened. Egg yolks curdle if overheated, leaving grainy lumps. Stopping once it is slightly thickened lets it set further as it cools, giving a smooth texture.

Swap the lemon

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

  1. Figfits better
  2. Peachfits better
  3. Blueberryfits better
  4. Lemonthe original

Fit is the average pairing score against milk, sugar, egg, vanilla. 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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