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Custard Kettle

A custard made by slowly heating milk and egg yolks in a kettle over boiling water.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Nutmeg and cinnamon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 11,917 recipes. Both carry estragole, which smells anise, licorice. The science ↓

Custard Kettle

Ingredients

Directions

Prepare

  1. Set a pan or pot in a kettle of boiling water.

Make the custard

  1. Heat the milk until it reaches a slight foam, then add the sugar to cool it.

  2. In a bowl, mix the beaten and strained yolks with the sugar.

  3. Gradually add several spoons of boiling milk to the egg mixture until heated through.

  4. Slowly stir the egg mixture into the boiling milk, stirring constantly until it thickens slightly.

Finish

  1. Remove from heat and cool immediately in cold water or a cold dish to prevent curdling.

  2. Add flavoring extracts after removing from the stove.

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. Nutmeg + cinnamontop 1% of all pairs
    Smell alikestrong
    Cooked together11,917 recipes

    Shared aroma: estragole (anise, licorice).

  2. Vanilla + peachtop 1% of all pairs
    Smell alikestrong
    Cooked together558 recipes

    Shared aroma: beta-damascenone (apple, rose).

  3. Vanilla + cinnamontop 1% of all pairs
    Smell alikestrong
    Cooked together5,287 recipes

    Shared aroma: 4-methoxybenzaldehyde (sweet, anise).

  4. Laurel + cinnamontop 4% of all pairs
    Smell alikestrong
    Cooked together691 recipes

    Shared aroma: cinnamyl acetate (sweet aromatic, cinnamon).

  5. Milk + vanillatop 5% of all pairs
    Smell alikemoderate
    Cooked together19,187 recipes

    Shared aroma: ethyl caproate (fruity, apple peel).

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 egg yolks thicken into a custard.
Egg yolks
Thicken the custard as they set gently with heat.
Sugar
Sweetens the custard.

The step that matters

Stirring the egg mixture into the hot milk. Egg proteins can scramble and curdle if the mixture gets too hot or is heated too fast. Tempering with hot milk first, stirring constantly, and cooling right after it thickens keeps the custard smooth.

Swap the peach

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

  1. Figfits better
  2. Blueberryfits about as well
  3. Peachthe original
  4. Cherryfits about as well

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