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Sweet Sauces

A custard-like sauce made from milk, lemon rind, sugar, vanilla, and egg yolks.

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 ↓

Sweet Sauces

Ingredients

Directions

Make the custard

  1. Heat the milk with the lemon rind.

  2. Pour the hot milk over the beaten egg yolks.

  3. Strain the mixture and add sugar.

  4. Stir until it thickens, then pour out immediately.

Serve

  1. Serve hot or cold.

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. Lemon + vanillatop 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. Lemon + sugartop 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
Thicken the custard as they set with gentle heat, giving it a smooth, rich body.
Milk
Forms the liquid base that the yolks thicken into a pourable sauce.
Sugar
Adds sweetness that balances the richness of the yolks and milk.
Lemon rind
Adds bright citrus aroma that infuses into the warm milk.
Vanilla essence
Adds a warm, sweet aroma that rounds out the custard flavour.

The step that matters

Stir until it thickens, then pour out immediately. Egg yolks thicken through gentle heat, but if the custard gets too hot they curdle and turn grainy. Stirring keeps heat even, and removing it promptly stops the yolks from overcooking.

Swap the lemon

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

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

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