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Dessert

Boiled Icing

A simple icing made by boiling sugar and water, then adding egg whites and beating until cool and fluffy.

From an old cookbook · modernised transcription
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Why it works: Sugar and egg are a kitchen classic. They rank in the top 21% of all ingredient pairs, and cooks put them together in 122,807 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Boiled Icing

Ingredients

Directions

Make the syrup

  1. Combine sugar and water in a saucepan.

  2. Boil on low heat until the mixture is waxy or stringy.

Finish the icing

  1. Remove from heat and add the egg whites.

  2. Beat until the icing is cool and fluffy.

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

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

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Sugar
Sweetens the icing and, cooked into a syrup, gives it body and a set structure.
Egg whites
Whipped into the hot syrup, they trap air and create a light, fluffy texture.

The step that matters

Boil until waxy or stringy. The syrup must reach the right concentration. Stopping too early leaves the icing runny, while cooking too long makes it hard and grainy as it cools.

“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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