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Dessert

Ornamental Frosting

A stiff, sugar-based frosting made from egg whites, icing sugar, and lemon juice or acetic acid.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 ingredients
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Why it works: Sugar and lemon are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Ornamental Frosting

Ingredients

Directions

  1. Place the unbeaten egg whites in a large bowl and sift in the icing sugar.

  2. Beat vigorously with a wooden spoon until combined.

  3. Add lemon juice or acetic acid and continue beating until stiff.

  4. Test the icing by cutting through it with a knife; it should hold its shape. Add more sugar if necessary.

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 + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

  2. Egg + lemontop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

  3. Egg + sugartop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

    Shared aroma: 2-nonenal (fatty, green).

Sugar and lemon 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

Egg whites
Whipped into a foam that gives the icing its structure and stiffness.
Icing sugar
Dissolves into the whites to add sweetness and body, thickening the icing.
Lemon juice
Acidity stabilises the whipped egg white foam so it holds its shape.

The step that matters

Beating until stiff. Egg white foam must be beaten until it holds firm peaks; underbeaten icing stays soft and will not hold its shape, while the acid helps the foam stay stable.

Swap the lemon

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

  1. Vanillafits better
  2. Raisinfits about as well
  3. Lemonthe original
  4. Datesfits less well

Fit is the average pairing score against egg, 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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