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Hard Sauce

Hard Sauce is a mixture of sugar, butter, and various flavorings, served in soft, vanilla, or apple jelly variations.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 15 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 base

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

  2. Flavor to taste and shape into a pyramid on a fancy dish.

Make the soft sauce

  1. Add the egg yolk to the mixture, beat well, and stir into the boiling water.

  2. Stir until it foams.

Make the vanilla sauce

  1. Cream the butter and add the powdered sugar.

  2. Just before serving, stir in the boiling water and fold in the whipped egg white until foamy.

Make the apple jelly sauce

  1. Whip the apple jelly until smooth, then gradually add melted butter, lemon juice, and nutmeg.

  2. Heat the mixture in a bowl over boiling water, stirring constantly until boiling.

  3. Beat in the powdered sugar and wine, then cover and let stand in the boiling water until needed.

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. Vanilla + appletop 8% of all pairs
    Smell alikemoderate
    Cooked together1,501 recipes

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

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

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

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

    Shared aroma: eucalyptol (eucalyptus, herbal).

  5. Apple + nutmegtop 12% of all pairs
    Smell alikemoderate
    Cooked together3,790 recipes

    Shared aroma: estragole (anise, licorice).

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
Creams with sugar to give the sauce its rich, smooth body.
Sugar
Sweetens the sauce and helps give it body when creamed with butter.
Egg yolk
Adds richness and emulsifying power to the soft sauce.
Egg white
Whipped and folded in to lighten the vanilla sauce.
Apple jelly
Provides sweetness and fruity flavor to the apple jelly sauce.
Powdered sugar
Dissolves smoothly into the creamed fat for a fine, sweet texture.

The step that matters

Adding the egg white to the vanilla sauce. Whipped egg white traps air and lightens the sauce, but if it is overmixed or deflated by stirring instead of folding, the sauce becomes dense and loses its foamy texture.

Swap the apple

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

  1. Figfits better
  2. Blueberryfits better
  3. Blackberryfits better
  4. Applethe original

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