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Dessert

Boiled Frosting

A frosting made by boiling sugar and water, then incorporating beaten egg white and vanilla.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Boiled Frosting

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 ↓

Boiled Frosting

Ingredients

Directions

Make the syrup

  1. In a saucepan, combine the sugar and water.

  2. Boil slowly until it forms a soft ball in cold water or reaches 231°F (110°C). In damp weather, boil a little longer.

Combine and finish

  1. Slowly pour the syrup into the beaten egg white, adding a tablespoon at a time to avoid cooking the egg too quickly. Beat well after each addition.

  2. Add the vanilla and mix until smooth.

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.

Photo for illustrative purposes only · Contact us to use it

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. Egg + vanillatop 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

White sugar
Dissolves into the syrup to provide sweetness and the body of the frosting.
Water
Dissolves the sugar so it can be boiled into a syrup.
Egg white
Beaten to foam, it traps air and gives the frosting a light, fluffy structure.

The step that matters

Pouring the hot syrup into the egg white. Adding the syrup too fast cooks the egg white unevenly, causing lumps or a grainy texture. Pouring slowly while beating keeps the foam smooth and stable.

“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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