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Dessert

Chocolate Filling

A chocolate filling made with chocolate, boiling water, corn syrup, sugar, cornstarch, vanilla, and butter.

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

Ingredients

Directions

  1. In a saucepan, combine chocolate and boiling water.

  2. Add Karo corn syrup, sugar, cornstarch, and vanilla extract.

  3. Cook over medium heat, stirring until smooth.

  4. Remove from heat and stir in butter until melted.

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. Syrup + sugartop 6% of all pairs
    Smell alikestrong
    Cooked together5,842 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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

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

  4. Corn + vanillatop 9% of all pairs
    Smell alikemoderate
    Cooked together1,943 recipes

    Shared aroma: ethyl cinnamate (sweet, balsamic).

  5. Syrup + vanillatop 12% of all pairs
    Smell alikelow
    Cooked together1,855 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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

Chocolate
Provides the main flavor and, once melted into the water, the body of the filling.
Cornstarch
Thickens the filling as it heats, giving it a smooth, spoonable texture.
Sugar
Adds sweetness and helps balance the bitterness of the chocolate.
Karo corn syrup
Adds sweetness and a smooth, glossy texture that resists crystallizing.
Butter
Adds richness and a silky mouthfeel to the finished filling.

The step that matters

Cook over medium heat, stirring until smooth. Cornstarch can form lumps if it is not stirred while heating. Constant stirring disperses the starch so it thickens evenly into a smooth filling instead of a clumpy one.

“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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