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Dessert

Hard Sauce

A butter and confectioner's sugar glaze flavored with lemon, vanilla, and nutmeg.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Lemon and nutmeg 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. Cream the butter in a mixing bowl.

  2. Gradually add the confectioner's sugar while beating constantly.

  3. Add the lemon and vanilla extracts drop by drop.

  4. If desired, substitute brandy for the extracts.

Serve

  1. Force the mixture through a pastry bag onto the serving dish.

  2. Sprinkle with nutmeg before serving.

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. Lemon + nutmegtop 5% of all pairs
    Smell alikestrong
    Cooked together11,318 recipes

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

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

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

  3. Vanilla + nutmegtop 10% of all pairs
    Smell alikestrong
    Cooked together2,781 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

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

    Shared aroma: guaiacol (smoky, sweet).

  5. Lemon + vanillatop 15% of all pairs
    Smell alikemoderate
    Cooked together5,961 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

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 fat and richness, giving the sauce its smooth, creamy body.
Confectioner's sugar
Adds sweetness and, dissolved into the butter, gives the sauce a smooth, firm texture.
Lemon extract
Adds bright citrus aroma that balances the sweetness of the sugar and butter.
Vanilla extract
Adds warm, rounded aroma that complements the butter and sugar.

The step that matters

Add the extracts drop by drop. Flavour extracts are concentrated and mostly alcohol-based, and adding them slowly while beating lets them disperse evenly without the butter separating or the sauce becoming runny.

Swap the lemon

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

  1. Figfits better
  2. Coconutfits better
  3. Blueberryfits better
  4. Lemonthe original

Fit is the average pairing score against butter, sugar, vanilla, nutmeg. 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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