Why it works: Flour and raisin match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 9,075 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Rock Cakes
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
In a bowl, combine flour and sugar.
Rub in the butter lightly with your fingers.
Add the raisins, baking powder, and ginger, and mix well.
Beat the egg and mix in 2 to 3 tablespoons of milk.
Stir the egg mixture into the dry ingredients; add more milk if necessary.
Shape and bake
Butter a large baking tray.
Drop spoonfuls of the mixture onto the tray, leaving 1.5 inches between each.
Dust sugar over the top and bake for 10 to 15 minutes at 400°F (200°C).
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.
-
Flour + raisintop 1% of all pairsSmell alikestrongCooked together9,075 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Raisin + gingertop 11% of all pairsSmell alikemoderateCooked together1,242 recipes
Shared aroma: decanal (soap, orange peel).
-
Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Raisin + sugartop 13% of all pairsSmell alikemoderateCooked together12,481 recipes
Shared aroma: beta-damascenone (apple, rose).
Flour and butter 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
- Flour
- Provides the structure that holds the cakes together as they bake.
- Egg
- Binds the mixture and adds structure and richness to the cakes.
- Butter
- Adds fat that tenderises the crumb and gives a rich flavour.
- Baking powder
- Releases gas as it heats, helping the cakes rise and turn light.
- Sultana raisins
- Add sweetness and moisture, with chewy pockets throughout the cakes.
The step that matters
Stir the egg mixture into the dry ingredients. Adding milk gradually lets you reach a soft but not sticky dough. Overmixing develops gluten in the flour, which can make the cakes tough and dense.
Swap the ginger
How well each one fits the dish's main ingredients (flour, egg, raisin, sugar, butter, milk):
- Cinnamonfits better
- Nutmegfits better
- Capersfits about as well
- Gingerthe original
Fit is the average pairing score against flour, egg, raisin, sugar, butter, 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
Ginger Cookies213 recipes
Ginger Cake93 recipes
Soft Ginger Bread85 recipes
Soft Ginger Cake56 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.