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Dessert

Chocolate Cake

A chocolate cake made with cocoa powder, butter, sugar, eggs, sour milk, flour, baking soda, and vanilla.

From an old cookbook · modernised transcription
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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 Cake

Ingredients

Directions

The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.

Make the batter

  1. Melt cocoa powder with a little water over low heat.

  2. In a bowl, mix egg yolks, butter, and sugar; beat thoroughly.

  3. Add sour milk, flour, and melted cocoa to the mixture.

  4. Fold in the beaten egg whites and vanilla extract.

Bake and assemble

  1. Divide the batter into two layers and bake at 350°F (175°C) until done.

  2. Cool and layer with vanilla icing.

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. Butter + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

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

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

  4. Vanilla + cocoa powdertop 10% of all pairs
    Smell alikemoderate
    Cooked together2,189 recipes

    Shared aroma: sotolon (curry, maple).

  5. Butter + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

Eggs
Yolks enrich and bind the batter, while beaten whites add lift and a light crumb.
Baking soda
Reacts with the sour milk's acid to produce gas that lifts the cake.
Butter
Adds fat for tenderness and a rich mouthfeel.
Flour
Forms the structure that holds the cake together as it bakes.
Sour milk
Its acidity activates the baking soda and tenderizes the crumb.
Cocoa powder
Provides chocolate flavor and deep color to the cake.

The step that matters

Fold in the beaten egg whites. Folding gently keeps the air in the whites intact; stirring hard would deflate them and make the cake denser and less airy.

“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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