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Dessert

Foamy Sauce II

A butter and sugar sauce thickened over hot water, finished with lemon juice, vanilla, and beaten egg whites.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 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 ↓

Foamy Sauce II

Ingredients

Directions

Make the base

  1. Cream the butter in a mixing bowl.

  2. Add the sugar, well-beaten egg yolks, and milk, then mix well.

  3. Cook the mixture over hot water until thick, stirring constantly.

  4. Add the lemon juice and vanilla.

Finish and serve

  1. Pour slowly over the stiffly beaten egg whites, then beat thoroughly.

  2. Serve immediately.

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. Butter + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

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

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

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

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

    Shared aroma: guaiacol (smoky, sweet).

  5. Lemon + vanillatop 15% of all pairs
    Smell alikemoderate
    Cooked together5,961 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

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

Butter
Adds richness and a smooth, creamy body to the sauce.
Sugar
Sweetens the sauce and helps give it a smooth texture.
Eggs
Yolks thicken the base on heating, and whites provide the light foam.
Lemon juice
Adds acidity that brightens the sweetness and richness of the sauce.

The step that matters

Cooking over hot water until thick. Egg yolks thicken as they heat but can curdle or scramble if the heat is too high. Constant stirring spreads the heat evenly and keeps the custard smooth.

Swap the lemon

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

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

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