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Dessert

Hard Sauce

A glaze made from powdered sugar, butter, egg white, vanilla, and lemon juice.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Sugar and vanilla are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 35,032 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

Hard Sauce

Ingredients

Directions

  1. In a bowl, cream together the powdered sugar and butter.

  2. Add the egg white, vanilla extract, and lemon juice.

  3. Beat the mixture until creamy.

  4. Set the bowl on ice to cool.

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

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

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

    Shared aroma: guaiacol (smoky, sweet).

  3. Vanilla + lemontop 15% of all pairs
    Smell alikemoderate
    Cooked together5,961 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

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

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

  5. Butter + eggtop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

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

Powdered sugar
Provides sweetness and body, thickening the sauce as it dissolves into the butter.
Butter
Adds fat and richness, giving the sauce a creamy, smooth texture.
Egg white
Adds protein that whips into the mixture, lightening its texture and helping it hold together.

The step that matters

Set the bowl on ice to cool. Cooling firms the butter so the sauce thickens and holds its shape instead of turning greasy or runny. Cooling it too little leaves it soft and loose.

Swap the lemon

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

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

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