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 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point. The book gives no cooking times either; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.
Prepare the batter
Preheat your oven to 350°F (175°C).
In a large bowl, cream together the sugar and butter until light and fluffy.
Beat in the eggs one at a time, then stir in the milk.
In another bowl, combine the flour and grated ammonia.
Gradually add the dry ingredients to the wet mixture, mixing until just combined.
Fold in the currants.
Bake
Drop spoonfuls of the batter onto a baking sheet.
Bake for 20-25 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.
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.
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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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
- Forms the main structure that holds the cakes together as they bake.
- Butter
- Adds fat that tenderizes the crumb and carries flavor.
- Sugar
- Sweetens the cakes and helps create a light, creamed texture with the butter.
- Eggs
- Bind the batter and add structure and richness to the crumb.
- Milk
- Adds moisture that hydrates the flour and softens the crumb.
- Grated ammonia
- Acts as a leavening agent that lifts the batter so the cakes rise.
The step that matters
Mixing the dry ingredients into the wet mixture. Stirring only until just combined keeps gluten development low, so the cakes stay tender rather than tough and dense.
Swap the currant
How well each one fits the dish's main ingredients (sugar, flour, butter, milk, egg):
- Vanillafits better
- Raisinfits better
- Figfits better
- Currantthe original
Fit is the average pairing score against sugar, flour, butter, milk, egg. 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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