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Dessert

Rock Cake

A sweet cake made with sugar, butter, eggs, flour, baking powder, and currants.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Rock 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.

Prepare

  1. Preheat your oven to 350°F (175°C).

Make the batter

  1. In a mixing bowl, cream together the sugar and butter.

  2. Beat in the eggs one at a time.

  3. Gradually add the flour and baking powder, mixing well.

  4. Fold in the currants.

Shape

  1. Drop spoonfuls of the mixture onto a baking sheet.

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

    Shared aroma: isobutyraldehyde (malty, green).

  2. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  3. Egg + flourtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Butter + curranttop 17% of all pairs
    Smell alikemoderate
    Cooked together7,856 recipes

    Shared aroma: isoamyl acetate (banana, pear).

  5. Butter + eggtop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

Butter and flour barely smell alike, yet cooks put them together in 124,287 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

Butter
Creaming with sugar traps air and gives the cake a tender crumb and rich flavour.
Eggs
Add structure and moisture, binding the batter as it sets in the oven.
Flour
Forms the main structure that holds the cake together as it bakes.
Baking powder
Releases gas when heated, helping the cakes rise and stay light.
Sugar
Sweetens the batter and, creamed with butter, helps create a light texture.
Currants
Add sweetness and bursts of fruit flavour throughout the cakes.

The step that matters

Creaming the sugar and butter. Beating the butter and sugar together until light traps air bubbles that expand in the oven. Under-creaming leaves a dense cake, while over-softened butter can make the batter greasy and spread.

Swap the currant

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

  1. Raisinfits better
  2. Vanillafits better
  3. Figfits better
  4. Currantthe original

Fit is the average pairing score against sugar, butter, egg, flour. 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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