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Dessert

Hard Sauce

A firm butter and sugar sauce flavored with lemon or vanilla, used for hot puddings.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 ingredients
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Why it works: Butter and lemon are a kitchen classic. They rank in the top 16% of all ingredient pairs, and cooks put them together in 41,227 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓

Hard Sauce

Ingredients

Directions

Make the sauce

  1. In a warm bowl, cream the butter until smooth.

  2. Gradually add the powdered sugar, then mix in the lemon or vanilla extract.

Shape and chill

  1. Pack the mixture into a small dish and stamp it with a butter mold or the bottom of a glass.

  2. Refrigerate until very hard.

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 + lemontop 16% of all pairs
    Smell alikemoderate
    Cooked together41,227 recipes

    Shared aroma: 3-hexenal (apple, fruity).

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

    Shared aroma: guaiacol (smoky, sweet).

  3. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

Lemon and sugar barely smell alike, yet cooks put them together in 53,532 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 sets firm when chilled to give the sauce its shape.
Powdered sugar
Adds sweetness and dissolves smoothly into the butter for a fine, even texture.
Lemon or vanilla extract
Adds aroma and flavour to the butter and sugar base.

The step that matters

Creaming the butter until smooth. Butter that is too cold stays lumpy, and sugar added to it will not blend evenly. Softened, warm butter creams into a smooth base that holds the sugar well.

Swap the lemon

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

  1. Vanillafits better
  2. Figfits better
  3. Peachfits better
  4. Lemonthe original

Fit is the average pairing score against butter, sugar. 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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