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Dessert

Hard Sauce

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

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 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. In a warm bowl, cream the butter until smooth.

  2. Gradually add the powdered sugar and then the flavoring.

Shape and chill

  1. Transfer to a small dish and shape with a butter mold or a glass.

  2. Chill in the refrigerator until very hard.

  3. Alternatively, serve it piled lightly on a fancy dish and call it Snowdrift Sauce.

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

    Shared aroma: guaiacol (smoky, sweet).

  5. 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 so the sauce can be shaped.
Powdered sugar
Adds sweetness and dissolves smoothly into the butter, giving the sauce a fine texture.

The step that matters

Creaming the butter until smooth. Butter must be soft enough to cream evenly. If it is too cold, the sugar will not blend in smoothly and the texture will be grainy. Warming the bowl helps the butter soften without melting.

Swap the nutmeg

The recipe marks nutmeg as optional. How well each one fits the dish's main ingredients (butter, lemon, sugar):

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

Fit is the average pairing score against butter, lemon, 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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