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Dessert

Foaming Sauce

A sweet sauce made with sugar, flour, butter, eggs, water, and vanilla, finished with folded egg whites.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Sugar and vanilla are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 35,032 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

Foaming Sauce

Ingredients

Directions

Make the base

  1. Cream together the sugar, flour, and butter until well combined.

  2. Add the beaten egg yolks to the mixture.

  3. Place the bowl in a pan of boiling water.

  4. Gradually add 1 cup of water, stirring well.

  5. Add 1 teaspoon of vanilla.

Finish the sauce

  1. Fold in the beaten egg whites on top.

  2. Mix the egg whites with the rest of the sauce.

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

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

  2. Flour + buttertop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Flour + vanillatop 12% of all pairs
    Smell alikemoderate
    Cooked together19,241 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: guaiacol (smoky, sweet).

  5. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

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

Sugar
Sweetens the sauce and adds body to its texture.
Butter
Adds fat for richness and a smooth, silky mouthfeel.
Eggs
Yolks enrich and thicken the sauce, while whites trap air to create foam.
Flour
Thickens the mixture slightly and gives it more body.

The step that matters

Fold in the beaten egg whites. Beaten whites hold air bubbles that make the sauce light and foamy. Stirring or mixing too hard deflates them, so fold gently and keep the foam intact.

Swap the vanilla

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

  1. Raisinfits better
  2. Vanillathe original
  3. Figfits less well
  4. Lemonfits less well

Fit is the average pairing score against sugar, flour, butter, 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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