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Dessert

Ice Cream Icing for White Cake

A powdered sugar icing with vanilla, citric acid, and egg whites, boiled and cooled for spreading on white cake.

From an old cookbook · modernised transcription
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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 ↓

Ice Cream Icing for White Cake

Ingredients

Directions

Make the syrup

  1. Boil 2 cups of powdered sugar to a thick syrup.

  2. Add 3 teaspoons of vanilla extract and let it cool.

  3. Once cool, mix in the beaten egg whites and 2 teaspoons of citric acid.

Make the icing

  1. In a separate bowl, combine 1 pound of powdered sugar with 1 tablespoon of cold water.

  2. Add the slightly beaten egg whites to the sugar and water mixture.

  3. Place the bowl in a vessel of boiling water and heat until it becomes thin and clear.

  4. Continue heating until it thickens, then remove from heat.

  5. Stir while cooling until thick enough to spread with a knife.

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 + eggtop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

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

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

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, boiled into syrup, the body that thickens the icing.
Egg whites
Whip and set with heat to give the icing its light, spreadable structure.
Citric acid
Adds acidity that helps keep the icing stable and smooth.

The step that matters

Heating the egg white and sugar mixture over boiling water. Heating must stop once the mixture thickens. Overheating can cause the egg whites to scramble or the icing to become grainy, and removing it from heat lets the egg proteins set into a smooth, spreadable texture.

“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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