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Dessert

Chocolate Filling

A chocolate filling made by boiling chocolate, brown sugar, milk, butter, and cornstarch until thick, then adding vanilla.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 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 Filling

Ingredients

Directions

Make the filling

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

  2. Mix and boil until the bubbles are large, dark brown, and popping, stirring nearly constantly.

  3. Remove from heat, add vanilla, and beat until the mixture is the consistency of boiled icing.

Assemble

  1. Spread quickly in thick layers between white cake.

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. Chocolate + sugartop 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

Baker's chocolate
Provides the chocolate flavor and dark color of the filling.
Light brown sugar
Adds sweetness and, as it cooks, a caramel-like depth to the filling.
Cornstarch
Thickens the mixture as it boils so it sets into a spreadable filling.
Butter
Adds richness and a smooth, creamy mouthfeel.

The step that matters

Boiling until the bubbles are large and dark brown. Cornstarch thickens only when the mixture reaches a full boil, and stirring keeps it from scorching on the bottom of the pan. Stop too early and the filling stays runny; go too long and it can turn stiff or grainy.

“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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