Skip to main content
Dessert

Foamy Sauce

A sweet sauce made with butter, powdered sugar, vanilla, boiling water, and beaten egg white.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
Jump to recipe ↓

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 ↓

Foamy Sauce

Ingredients

Directions

Make the sauce

  1. Cream the butter and powdered sugar together.

  2. Add the vanilla and mix well.

  3. Just before serving, add the boiling water and stir thoroughly.

  4. Gently fold in the beaten egg white until well combined and foamy.

Serve

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

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

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

    Shared aroma: guaiacol (smoky, sweet).

  3. Butter + eggtop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

  4. Butter + sugartop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

  5. Sugar + eggtop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 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

Butter
Creamed with sugar to add richness and a smooth, tender body to the sauce.
Powdered sugar
Sweetens the sauce and dissolves smoothly into the creamed butter.
Egg white
Beaten stiff and folded in, it whips air into the sauce for a light, foamy texture.
Boiling water
Loosens the mixture and adds moisture to thin the sauce.
Vanilla
Adds aroma and flavour that rounds out the sweetness.

The step that matters

Fold the egg white gently. Stiffly beaten egg white holds air bubbles that give the sauce its foam. Vigorous stirring knocks that air out, so the sauce turns dense and flat instead of light.

“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.

You might also like

Vanilla Ice CreamVanilla Ice Cream108 recipesWhite CakeWhite Cake431 recipesPound CakePound Cake373 recipesOrange Bundt CakeOrange Bundt Cake349 recipes