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Dessert

Chocolate Filling

A thick chocolate filling made with cornstarch, sugar, milk, chocolate, egg yolk, and vanilla.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 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

  1. In a saucepan, combine cornstarch, sugar, salt, and milk. Cook over medium heat, stirring until thickened.

  2. Melt the chocolate in a heatproof bowl over simmering water.

  3. Once the milk mixture is thick, remove from heat and stir in the melted chocolate.

  4. Add the egg yolk and vanilla, mixing well until smooth.

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

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

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

    Shared aroma: guaiacol (smoky, sweet).

  5. Milk + chocolatetop 13% of all pairs
    Smell alikemoderate
    Cooked together9,128 recipes

    Shared aroma: gamma-nonanolactone (coconut, 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

Cornstarch
Thickens the milk mixture into a smooth, sliceable filling as it cooks.
Egg yolk
Adds richness and helps give the filling a smooth, creamy texture.
Chocolate
Provides the chocolate flavor and adds body to the filling.
Milk
Forms the liquid base that the cornstarch thickens.

The step that matters

Cook the milk mixture until thickened. Cornstarch only thickens fully when the mixture reaches a simmer and is stirred constantly. Stopping too early leaves the filling thin, while overcooking or scorching on the bottom can make it lumpy or taste burnt.

“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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