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Dessert

Hard Sauce

A simple butter and sugar glaze flavored with vanilla.

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 together the sugar and butter until smooth.

  2. Beat in the egg and vanilla extract.

  3. Use light-brown sugar instead of white for a richer flavor.

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. Sugar + buttertop 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

Sugar
Sweetens the sauce and, creamed with butter, helps trap air for a smooth texture.
Butter
Provides fat for richness and a smooth, spreadable body.
Egg
Emulsifies with the butter and adds richness and body to the sauce.
Light-brown sugar
Adds moisture and molasses notes for a deeper, richer flavor.

The step that matters

Beat in the egg and vanilla extract. Egg that is cold or added all at once can cause the butter to separate or look curdled. Adding it gradually while beating lets the fat and liquid emulsify into a smooth, even sauce.

“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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