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Dessert

Caramel Filling for Cake

A sweet caramel filling made with butter, sugar, water or milk, chocolate, and vanilla, used to spread on cakes.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Vanilla and milk 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 ↓

Caramel Filling for Cake

Ingredients

Directions

Prepare

  1. Melt the chocolate in a warm place.

  2. Combine butter, sugar, and water or milk in a saucepan.

Cook the filling

  1. Add the melted chocolate and boil for 20 minutes, stirring constantly.

  2. When the mixture hardens when dropped in cold water, remove from heat.

Finish

  1. Stir in vanilla and beat until thick.

  2. Spread the filling on the 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. Vanilla + milktop 5% of all pairs
    Smell alikemoderate
    Cooked together19,187 recipes

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

  2. Vanilla + chocolatetop 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. Vanilla + sugartop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

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

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

    Shared aroma: guaiacol (smoky, sweet).

Vanilla and sugar 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

Sugar
Sweetens the filling and, as it cooks down, sets firm when cooled.
Butter
Adds fat for a rich, smooth texture in the filling.
Chocolate
Provides the main chocolate flavor and body to the filling.
Vanilla
Adds aroma that rounds out the chocolate and sugar flavors.

The step that matters

Testing the set in cold water. Sugar syrup thickens as water evaporates and its sugar concentration rises, so removing it too early leaves a runny filling, while overcooking makes it too firm. Constant stirring prevents sugar from scorching on the pan bottom.

“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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