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Dessert

French Custards

A custard made by gently boiling milk with sugar and salt, then adding egg yolks and baking in a water bath until firm.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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French Custards

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 ↓

French Custards

Ingredients

Directions

Make the custard

  1. In a saucepan, gently boil the milk with sugar and salt for a few minutes.

  2. Remove from heat and briskly stir in the egg yolks.

  3. Butter a round deep dish and pour in the custard mixture.

Bake and serve

  1. Place the dish in a pan of boiling water, ensuring the water does not touch the custard.

  2. Simmer for 1 to 1.5 hours until the custard is firm in the middle.

  3. Keep a few live embers on the lid to prevent steam from falling into the custard.

  4. Serve cold, garnished with chopped macaroons or ratafias around the edge.

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. Orange + vanillatop 6% of all pairs
    Smell alikemoderate
    Cooked together2,371 recipes

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

  3. Milk + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  4. Sugar + vanillatop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

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

  5. Butter + vanillatop 14% of all pairs
    Smell alikemoderate
    Cooked together20,050 recipes

    Shared aroma: guaiacol (smoky, sweet).

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
Set the custard into a firm, sliceable texture as they cook gently.
Milk
Forms the liquid base and gives the custard its creamy body.
Sugar
Sweetens the custard and softens its texture slightly.

The step that matters

Keep the water bath from touching the custard. Egg proteins set gently at moderate heat. If the custard touches the boiling water or steam drips onto it, the surface can overheat and curdle, leaving a grainy texture.

Swap the orange

The recipe marks orange as optional. How well each one fits the dish's main ingredients (milk, egg, sugar, butter, vanilla):

  1. Figfits better
  2. Peachfits better
  3. Coconutfits better
  4. Orangethe original

Fit is the average pairing score against milk, egg, sugar, butter, 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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