Skip to main content
Sauce

Hard Sauce

A buttery whisky sauce sweetened with powdered sugar and vanilla, finished with folded egg whites.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
Jump to recipe ↓

Why it works: Butter and vanilla are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 20,050 recipes. Both carry guaiacol, which smells smoky, sweet. The science ↓

Hard Sauce

Ingredients

Directions

  1. Cream the butter until very light.

  2. Gradually add the powdered sugar.

  3. Stir in the vanilla and whisky.

  4. Fold in the egg whites that have been beaten until stiff and dry.

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

    Shared aroma: guaiacol (smoky, sweet).

  2. Vanilla + whiskytop 15% of all pairs
    Smell alikemoderate
    Cooked together135 recipes

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

  3. Butter + whiskytop 15% of all pairs
    Smell alikemoderate
    Cooked together335 recipes

    Shared aroma: ethyl octanoate (fruity, wine).

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

    Shared aroma: decanal (soap, orange peel).

  5. Vanilla + eggtop 23% of all pairs
    Smell alikelow
    Cooked together27,347 recipes

    Shared aroma: 1-octen-3-ol (mushroom, earthy).

Vanilla and egg barely smell alike, yet cooks put them together in 27,347 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
Creaming with sugar traps air, giving the sauce a light, smooth body and rich flavour.
Powdered sugar
Sweetens the sauce and dissolves smoothly into the creamed butter for a fine texture.
Egg whites
Whipped to stiff foam, they add airy lightness to the sauce.
Whisky
Adds distinctive aroma and warm flavour to the sauce.

The step that matters

Fold in the egg whites. Egg whites must be beaten until stiff and dry, then folded gently. Deflating the foam by stirring hard loses the air that makes the sauce light.

Swap the vanilla

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

  1. Applefits about as well
  2. Vanillathe original
  3. Figfits about as well
  4. Currantfits about as well

Fit is the average pairing score against butter, whisky, egg. 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.

You might also like

Wine Sauce (for stewed fruit)Wine Sauce (for stewed fruit)186 recipesCaper SauceCaper Sauce180 recipesBrown SauceBrown Sauce141 recipesDutch SauceDutch Sauce74 recipes