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Sauce

Foam Sauce

A sauce made from grape juice, eggs, flour, sugar, and lemon, steamed until foamy.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Grape and lemon are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 2,412 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓

Foam Sauce

Ingredients

Directions

  1. Combine the grape juice, egg yolks, whole eggs, flour, sugar, lemon juice, and lemon peel in a steam pot.

  2. Place the steam pot on the fire and stir the mixture until it becomes foamy.

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. Grape + lemontop 14% of all pairs
    Smell alikemoderate
    Cooked together2,412 recipes

    Shared aroma: 3-hexenal (apple, fruity).

  2. Flour + sugartop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  3. Egg + flourtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Flour + lemontop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  5. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

Egg and flour barely smell alike, yet cooks put them together in 106,462 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
Emulsify and enrich the sauce, adding richness and a smooth, thickened body.
Whole eggs
Provide protein that thickens and sets as the mixture heats, giving the foam body.
All-purpose flour
Starch that helps stabilize the foam and gives the sauce more body.
Sugar
Adds sweetness and helps stabilize the foam structure.
Grape juice
Forms the liquid base and contributes fruity sweetness and flavor.
Lemon juice
Adds acidity that brightens the flavor and balances the sweetness.

The step that matters

Stirring over the fire until foamy. Egg proteins begin to set and can curdle or scramble if the mixture gets too hot or is left unstirred. Constant stirring spreads the heat evenly and keeps the mixture smooth while air is incorporated into a foam.

Swap the grape

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

  1. Raisinfits better
  2. Vanillafits better
  3. Orangefits better
  4. Grapethe original

Fit is the average pairing score against egg, flour, sugar, lemon. 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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