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Dessert

Hard Sauce

A sweet butter and sugar sauce flavored with vanilla and thickened with cream or milk.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Butter and cream are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 41,516 recipes. Both carry delta-dodecalactone, which smells sweet, creamy. The science ↓

Hard Sauce

Ingredients

Directions

Cream the base

  1. Beat together the butter and sugar until creamy and white, then flavor with vanilla extract.

  2. Cream the butter in a separate bowl.

  3. Gradually stir in the sugar until very light.

Finish the sauce

  1. Add the cream or milk and vanilla flavoring, then mix well.

  2. Place the bowl in a pan of hot water until the sauce is smooth and creamy, but do not heat enough to melt the sugar.

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. Butter + creamtop 8% of all pairs
    Smell alikemoderate
    Cooked together41,516 recipes

    Shared aroma: delta-dodecalactone (sweet, creamy).

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

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

  3. Sugar + creamtop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

    Shared aroma: 2,3-butanedione (butter, sweet).

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

    Shared aroma: guaiacol (smoky, sweet).

  5. Vanilla + creamtop 15% of all pairs
    Smell alikelow
    Cooked together12,301 recipes

    Shared aroma: 2-nonanone (fruity, floral).

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 richness and, when creamed with sugar, traps air for a light, smooth texture.
Sugar
Sweetens the sauce and, creamed with butter, helps give it a light, fine texture.
Cream or milk
Adds moisture so the sauce loosens and becomes smooth and spreadable.
Vanilla extract
Adds aroma and a rounded flavor that complements the butter and sugar.

The step that matters

Warming over hot water without melting the sugar. Gentle warmth softens the butter so the sauce turns smooth and creamy. If the sugar melts, it recrystallizes as it cools, leaving the sauce grainy instead of silky.

“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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