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Dessert

Caramel Frosting

A sweet frosting made from brown and white sugar, boiling water, egg whites, vanilla, and optional walnuts.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Caramel 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 ↓

Caramel Frosting

Ingredients

Directions

Make the syrup

  1. In a saucepan, mix brown sugar, white sugar, and boiling water.

  2. Bring to a boil and cook until the syrup threads when dropped from a spoon.

Make the frosting

  1. Slowly pour the syrup while constantly beating the egg whites.

  2. Continue beating until the mixture is nearly cool.

  3. Set the bowl in a pan of boiling water and cook, stirring constantly, until slightly granulated around the edges.

  4. Remove from heat and beat until the mixture holds its shape.

  5. Stir in vanilla and walnuts, if using.

Finish

  1. Pour the frosting onto the cake and spread with the back of a spoon for a rough surface.

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. Vanilla + walnuttop 10% of all pairs
    Smell alikestrong
    Cooked together2,730 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

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

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

  4. Egg + vanillatop 23% of all pairs
    Smell alikelow
    Cooked together27,347 recipes

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

  5. Egg + walnuttop 23% of all pairs
    Smell alikemoderate
    Cooked together6,037 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

Brown sugar
Provides the caramel flavour and sweetness, and dissolves into the syrup.
White sugar
Adds sweetness and helps the syrup reach the thread stage without crystallising.
Egg whites
Whipped with the hot syrup to create an airy, light, foamy structure.

The step that matters

Pouring the syrup into the egg whites. The syrup must be hot and poured slowly while beating constantly. Pouring too fast or letting the whites stop moving can cause uneven cooking or deflated, grainy frosting, since the hot sugar gradually cooks and sets the egg white foam.

Swap the walnut

The recipe marks walnut as optional. How well each one fits the dish's main ingredients (sugar, egg, vanilla):

  1. Almondfits better
  2. Chestnutfits better
  3. Hazelnutfits better
  4. Walnutthe 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.

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