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Dessert

Rock Cake

A small currant cake made with butter, flour, baking powder, lemon peel, sugar, and eggs, baked until golden.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 ingredients
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Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

Rock Cake

Ingredients

Directions

The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.

Prepare

  1. Preheat the oven to 400°F (200°C).

Make the dough

  1. Rub the butter into the flour until well combined.

  2. Stir in the baking powder, salt, lemon peel, sugar, and currants.

  3. Moisten the mixture with the beaten eggs and a little milk to form a stiff dough.

Shape and bake

  1. Shape the dough into small knobs and place them on a greased baking sheet, leaving space between each.

  2. Bake for 15 to 20 minutes until golden brown.

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

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

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

    Shared aroma: isobutyraldehyde (malty, green).

  3. Flour + milktop 14% of all pairs
    Smell alikelow
    Cooked together78,219 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Flour + sugartop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  5. Lemon + milktop 15% of all pairs
    Smell alikemoderate
    Cooked together19,053 recipes

    Shared aroma: 2-nonenal (fatty, green).

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
Rubbed into the flour, it coats flour particles and gives the cake a tender, crumbly texture.
All-purpose flour
Its proteins form the gluten network that gives the cakes their structure.
Eggs
Bind the dough and add structure and richness as they set in the oven.
Baking powder
Releases gas when heated, helping the knobs rise and become light.
Dried currants
Add concentrated sweetness and chewy bursts of fruit throughout the cakes.

The step that matters

Moistening the dough to a stiff consistency. Adding too much milk or egg makes the dough slack, so the knobs spread and bake flat and dense. Adding too little leaves dry, crumbly pieces. The dough should hold its shape when formed.

Swap the currant

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

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

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