Skip to main content
Dessert

Boiled Frosting

A frosting made by boiling sugar and water, then folding in beaten egg whites, lemon juice, and vanilla.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
Jump to recipe ↓
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. Pour boiling water over sugar in a saucepan.

  2. Boil until it forms a soft ball when tested in cold water.

Make the frosting

  1. Pour the hot syrup over the beaten egg whites.

  2. Beat the mixture until it cools.

  3. Add lemon juice and vanilla to taste.

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. Lemon + vanillatop 15% of all pairs
    Smell alikemoderate
    Cooked together5,961 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

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

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

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

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

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

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

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

Sugar
Sweetens the frosting and, boiled into syrup, gives it body and a set texture.
Egg whites
Whipped into a foam that traps air, giving the frosting its light, fluffy structure.
Lemon juice
Adds acidity that helps stabilize the egg white foam and brightens the sweetness.

The step that matters

Boil the syrup to a soft ball. Syrup boiled too little stays thin and runny, while boiled too long it turns stiff and grainy. Cooking to the soft ball stage gives the right sugar concentration for a smooth, spreadable frosting once it cools.

Swap the lemon

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

  1. Figfits better
  2. Blueberryfits better
  3. Peachfits better
  4. Lemonthe original

Fit is the average pairing score against sugar, egg, vanilla. 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

Lemon CakeLemon Cake228 recipesLemon IceLemon Ice147 recipesVanilla Ice CreamVanilla Ice Cream108 recipesLemon SherbetLemon Sherbet103 recipes