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Sauce

Foam Sauce

A light, sweet sauce made with butter, sugar, flour, nutmeg, boiling water, and optional vanilla.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Flour and nutmeg are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 18,623 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Foam Sauce

Ingredients

Directions

Make the sauce

  1. Cream the butter and sugar together until light and fluffy.

  2. Add the flour and nutmeg, mixing well.

  3. Gradually stir in the boiling water and bring to a boil.

Finish

  1. Flavor with vanilla just before serving.

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. Flour + nutmegtop 8% of all pairs
    Smell alikemoderate
    Cooked together18,623 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

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

  3. Nutmeg + vanillatop 10% of all pairs
    Smell alikestrong
    Cooked together2,781 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

  4. Butter + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: isobutyraldehyde (malty, 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
Creaming with sugar traps air and gives the sauce a light, rich body.
Sugar
Creamed with butter to add sweetness and help create a light, fluffy texture.
Flour
Thickens the sauce as it cooks with the boiling water.
Boiling water
Melts the creamed mixture into a smooth, pourable sauce as it heats.

The step that matters

Gradually stir in the boiling water. Adding the water slowly while stirring keeps the flour from clumping, so the sauce cooks up smooth rather than lumpy.

Swap the vanilla

The recipe marks vanilla as optional. How well each one fits the dish's main ingredients (butter, sugar, flour, nutmeg):

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

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