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Dessert

Hard Sauce

A sweet, thickened sauce made from butter, powdered sugar, vanilla or brandy, egg whites or cream, and nutmeg.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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 ↓

Hard Sauce

Ingredients

Directions

  1. Cream the butter until smooth.

  2. Gradually add the powdered sugar and beat until light.

  3. Add the egg whites or cream and beat until frothy.

  4. Heap the mixture on a dish, sprinkle with grated nutmeg, and refrigerate to harden.

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. Vanilla + nutmegtop 10% of all pairs
    Smell alikestrong
    Cooked together2,781 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

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

    Shared aroma: guaiacol (smoky, sweet).

  4. Butter + nutmegtop 16% of all pairs
    Smell alikemoderate
    Cooked together24,377 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

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

    Shared aroma: decanal (soap, orange peel).

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
Provides fat and richness, and when chilled it firms the sauce.
Powdered sugar
Adds sweetness and, beaten in, gives the sauce a light, smooth body.
Egg whites
Beaten in, they trap air and add a frothy, lighter texture.

The step that matters

Beat in the egg whites or cream until frothy. Beating incorporates air into the fat and sugar, which lightens the texture. Under-beating leaves the sauce dense, while over-beating after the liquid is added can make it loose and greasy.

Swap the nutmeg

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

  1. Cinnamonfits better
  2. Nutmegthe original
  3. Clovefits less well
  4. Peppermintfits less well

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