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Dessert

Rock Cakes

A sweet cake made with powdered sugar, lard, egg whites, milk, ammonia, lemon flavor, and flour, baked until golden.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Rock Cakes

Why it works: Milk and flour are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 78,219 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Rock Cakes

Oven, in the book's wordsA quick oven

Ingredients

Directions

The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.

Make the dough

  1. Rub the powdered sugar and lard together until light and fluffy.

  2. Add the egg whites, then mix in the milk and ammonia, followed by the lemon flavor.

  3. Gradually incorporate the flour until well combined.

Shape and bake

  1. Roll out the dough and roughen the tops with a tin scraper.

  2. Cut out shapes with a plain cutter and place a raisin in the center of each.

  3. Bake in a hot oven at 400°F (200°C) until golden.

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.

Photo for illustrative purposes only · Contact us to use it

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 + flourtop 14% of all pairs
    Smell alikelow
    Cooked together78,219 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. Milk + lemontop 15% of all pairs
    Smell alikemoderate
    Cooked together19,053 recipes

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

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

    Shared aroma: isobutyraldehyde (malty, green).

  5. Lemon + flourtop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Milk and flour barely smell alike, yet cooks put them together in 78,219 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, creamed with lard, helps create a light, fluffy texture.
Lard
Provides fat that tenderizes the dough and carries the creaming structure.
Egg whites
Add structure and help bind the dough together.
Milk
Adds moisture that hydrates the flour and softens the dough.
Flour
Forms the main structure of the cakes once combined with liquid.

The step that matters

Gradually incorporate the flour until well combined.. Adding flour gradually and mixing only until combined keeps the dough tender, because overworking flour develops gluten and makes the cakes tough.

Swap the lemon

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

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

Fit is the average pairing score against sugar, egg, milk, 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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