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Sauce

Hard Sauce

A lemon butter sauce made by beating light brown sugar and butter, then adding grated lemon rind and lemon juice.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 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

  1. Combine the brown sugar and butter in a mixing bowl.

  2. Beat until the mixture is very light and fluffy.

  3. Add the grated lemon rind and lemon juice, and mix well.

  4. Optionally substitute vanilla for the lemon.

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. Sugar + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

  3. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

Sugar and lemon 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
Creamed with sugar, it traps air and gives the sauce a rich, smooth body.
Very light brown sugar
Adds sweetness and a soft caramel note, and helps the creaming stay light and fluffy.
Lemon juice
Adds acidity that brightens the sweet, rich butter and sugar.
Grated lemon rind
Adds concentrated lemon aroma from the oils in the peel.

The step that matters

Beat until very light and fluffy. Beating the butter and sugar together incorporates air into the fat, which gives the sauce a light, smooth texture. Stopping too early leaves it dense and grainy.

Swap the lemon

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

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

Fit is the average pairing score against sugar, butter. 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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