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Dessert

Hard Sauce

A powdered sugar and butter sauce that hardens when chilled.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Nutmeg and lemon match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 11,318 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓

Hard Sauce

Ingredients

Directions

Make the sauce

  1. Combine powdered sugar and slightly warmed butter in a bowl and mix until well combined.

  2. Add grated nutmeg and lemon juice.

  3. Whip until smooth and light.

Chill and serve

  1. Mound on a dish 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. Nutmeg + lemontop 5% of all pairs
    Smell alikestrong
    Cooked together11,318 recipes

    Shared aroma: beta-phellandrene (minty, terpene).

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

    Shared aroma: eucalyptol (eucalyptus, herbal).

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

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

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

    Shared aroma: guaiacol (smoky, sweet).

  5. 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

Powdered sugar
Sweetens the sauce and dissolves into the butter to give it a smooth body.
Butter
Provides richness and fat that sets firm when chilled, giving the sauce its body.
Lemon juice
Adds acidity that brightens the sweetness and balances the rich butter.

The step that matters

Whip until smooth and light. Whipping softened butter with sugar incorporates air and dissolves the sugar evenly. If the butter is too warm or too cold, the sauce can turn greasy or grainy instead of smooth and light.

Swap the nutmeg

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

  1. Cinnamonfits better
  2. Parsleyfits about as well
  3. Nutmegthe original
  4. Tarragonfits about as well

Fit is the average pairing score against sugar, butter, lemon. 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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