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Dessert

Chocolate Icing

A chocolate icing made by heating chocolate, sugar, milk, and butter until thick, then adding vanilla.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Milk and vanilla are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 19,187 recipes. Both carry ethyl caproate, which smells fruity, apple peel. The science ↓

Chocolate Icing

Ingredients

Directions

  1. In a saucepan, combine the chocolate, sugar, milk, and butter.

  2. Cook over medium heat, stirring constantly, until the mixture thickens like caramel.

  3. Remove from heat and stir in the vanilla extract.

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. Milk + vanillatop 5% of all pairs
    Smell alikemoderate
    Cooked together19,187 recipes

    Shared aroma: ethyl caproate (fruity, apple peel).

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

    Shared aroma: sotolon (curry, maple).

  3. Milk + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

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

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

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

    Shared aroma: eucalyptol (eucalyptus, herbal).

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

Baker's chocolate
Provides the chocolate flavor and the dark color of the icing.
Sugar
Adds sweetness and, as it cooks with the milk, helps build a thick, glossy texture.
Milk
Supplies the liquid that cooks down and thickens into a creamy base.
Butter
Adds fat that makes the icing smooth and rich on the palate.
Vanilla extract
Adds aroma that rounds out the chocolate flavor.

The step that matters

Cook over medium heat, stirring constantly. Milk sugars and proteins scorch easily on the bottom of the pan. Constant stirring spreads the heat evenly while the liquid reduces, so the icing thickens smoothly without burning or turning grainy.

Swap the walnut

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

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

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