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Dessert

Chocolate Icing

A sweet glaze made from brown sugar, cake chocolate, butter, water, and vanilla.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Chocolate and vanilla are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 10,020 recipes. Both carry sotolon, which smells curry, maple. The science ↓

Chocolate Icing

Ingredients

Directions

  1. Combine brown sugar, cake chocolate, butter, and water in a saucepan.

  2. Boil the mixture until it hardens when dropped into cold water.

  3. Remove from heat, beat until smooth, and stir in vanilla.

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. Chocolate + vanillatop 5% of all pairs
    Smell alikemoderate
    Cooked together10,020 recipes

    Shared aroma: sotolon (curry, maple).

  2. Sugar + vanillatop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

    Shared aroma: beta-damascenone (apple, rose).

  3. Walnut + vanillatop 10% of all pairs
    Smell alikestrong
    Cooked together2,730 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

  4. Chocolate + walnuttop 10% of all pairs
    Smell alikemoderate
    Cooked together1,548 recipes

    Shared aroma: 3-ethyl-2,5-dimethylpyrazine (roasted, nutty).

  5. Sugar + chocolatetop 13% of all pairs
    Smell alikemoderate
    Cooked together15,404 recipes

    Shared aroma: guaiacol (smoky, sweet).

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 sweetness and, when boiled, builds the thick body of the icing.
Cake chocolate
Supplies the chocolate flavour and dark colour of the icing.
Butter
Adds fat for a smooth, glossy texture and richer mouthfeel.

The step that matters

Boiling to the hardening point. Sugar syrup must reach the right concentration to set when cooled. Boiling too short leaves the icing runny, while boiling too long makes it grainy or brittle once it cools.

Swap the walnut

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

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

Fit is the average pairing score against sugar, chocolate, butter, 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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