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Sauce

Foam Sauce

A light, sweet sauce made from egg yolks, powdered sugar, and boiling water.

From an old cookbook · modernised transcription
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Why it works: Egg and sugar are a kitchen classic. They rank in the top 21% of all ingredient pairs, and cooks put them together in 122,807 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Foam Sauce

Ingredients

Directions

Make the base

  1. Beat the yolks of the eggs until light.

  2. Cream the yolks with the powdered sugar.

  3. Place the bowl in boiling water and stir occasionally until warm throughout.

Finish the sauce

  1. Gently fold in the stiffly beaten egg whites.

  2. Add the boiling water just before serving.

  3. Flavor as desired.

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. Egg + sugartop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Egg yolks
Provide richness and body, and help the base thicken as it warms.
Egg whites
Trapped air bubbles from beating give the sauce its light, foamy texture.
Powdered sugar
Sweetens the sauce and blends smoothly into the creamed yolks.
Boiling water
Warms the mixture and loosens it to a smooth, pourable sauce.

The step that matters

Gently fold in the stiffly beaten egg whites.. Whites hold air in their beaten foam, which gives the sauce its lightness. Stirring vigorously deflates the foam, so the sauce turns dense and loses its airy texture.

“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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