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 Cakes
Ingredients
Directions
The book says “a rather quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Preheat the oven to 400°F (200°C).
Make the dough
Rub the butter, flour, baking powder, and sugar together until well combined.
Mix in the beaten eggs, essence of lemon, and enough milk to form a dough.
Bake
Drop the mixture onto a baking sheet in rough mounds.
Bake for 30 minutes or until golden brown.
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.
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
-
Lemon + milktop 15% of all pairsSmell alikemoderateCooked 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 keeps the cakes short and tender.
- Flour
- Provides the structure that holds the cakes together as they bake.
- Moist sugar
- Adds sweetness and moisture, and helps the surface brown.
- Eggs
- Bind the dough and add richness and structure as they set in the oven.
- Baking powder
- Releases gas when heated, helping the cakes rise and stay light.
The step that matters
Mounding the dough on the baking sheet. Rock cakes keep their irregular shape because the dough is stiff and spooned into mounds rather than spread. Loose or overly wet dough will spread and bake flat, losing the intended texture.
Swap the lemon
How well each one fits the dish's main ingredients (butter, flour, sugar, egg, milk):
- Vanillafits better
- Raisinfits better
- Figfits better
- Lemonthe original
Fit is the average pairing score against butter, flour, 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.
More rock cakes recipes
You might also like
Delicate Cake246 recipes
Boiled Frosting69 recipes
Citron Cake68 recipes
Scotch Cake63 recipesThe free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.