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Dessert

Hard Sauce

A sweet sauce made from sugar, butter, and optional egg yolk, boiled and whipped, with a vanilla variant.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 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

Make the hard sauce

  1. Beat together the sugar and butter until well combined.

  2. Flavor to taste.

  3. Shape the mixture into a pyramid.

  4. Place it on a fancy dish.

Make the soft sauce

  1. For soft sauce, add the egg yolk to the mixture and beat well.

  2. Stir into the boiling water over heat until it foams, then it is done.

Make the vanilla sauce

  1. For Vanilla Sauce, cream the butter.

  2. Add the powdered sugar.

  3. Just before serving, add the boiling water and stir well.

  4. Fold in the whipped egg white and beat to a foam.

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. Sugar + saucetop 13% of all pairs
    Smell alikestrong
    Cooked together5,147 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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

    Shared aroma: guaiacol (smoky, sweet).

  4. Butter + saucetop 15% of all pairs
    Smell alikelow
    Cooked together15,338 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  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

Butter
Adds richness and a smooth, creamy body to the sauce.
Sugar
Provides sweetness and, when creamed with butter, a light texture.
Egg yolk
Adds richness and helps bind the soft sauce.
Boiling water
Melts the sugar and loosens the mixture into a pourable sauce.
Egg white
Whipped, it adds lightness and a foamy texture to the vanilla sauce.
Powdered sugar
Dissolves easily, giving sweetness and a smooth texture to the vanilla sauce.

The step that matters

Fold in the whipped egg white. Whipped egg white traps air in its protein network to create foam. Folding gently keeps that air in the sauce, while vigorous stirring would deflate it and make the sauce dense.

“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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