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Dessert

Mocha Filling

A sweet chocolate and coffee filling made with powdered sugar, butter, cocoa, coffee, and vanilla.

From an old cookbook · modernised transcription
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Why it works: Cocoa and coffee work together. They rank in the top 3% of all ingredient pairs, and cooks put them together in 91 recipes. Both carry sotolon, which smells curry, maple. The science ↓

Mocha Filling

Ingredients

Directions

  1. Mix the powdered sugar and cocoa thoroughly.

  2. Add the softened butter, strong hot coffee, and vanilla.

  3. Beat until creamy and 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. Cocoa + coffeetop 3% of all pairs
    Smell alikemoderate
    Cooked together91 recipes

    Shared aroma: sotolon (curry, maple).

  2. Cocoa + vanillatop 4% of all pairs
    Smell alikemoderate
    Cooked together357 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. Coffee + vanillatop 9% of all pairs
    Smell alikemoderate
    Cooked together1,391 recipes

    Shared aroma: sotolon (curry, maple).

  5. Butter + vanillatop 14% of all pairs
    Smell alikemoderate
    Cooked together20,050 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

Powdered sugar
Adds sweetness and bulk, and its fine crystals dissolve into the filling for a smooth texture.
Butter
Provides fat that makes the filling rich and creamy and helps it hold its shape.
Cocoa
Supplies the chocolate flavour and deep brown colour of the filling.
Strong hot coffee
Adds liquid that dissolves the cocoa and deepens its chocolate flavour.

The step that matters

Beat until creamy and smooth. Sugar grains and cocoa lumps stay gritty unless beaten thoroughly with the butter and liquid. Proper beating dissolves the sugar and evenly emulsifies the fat, giving a smooth filling.

Swap the cocoa

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

  1. Cocoathe original
  2. Almondfits about as well
  3. Hazelnutfits less well
  4. Chestnutfits less well

Fit is the average pairing score against sugar, butter, coffee, 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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