Name: Rock Cakes
Ingredients: ½ cup butter; ½ cup moist sugar; 2 cups flour; ½ cup sultanas; 2 eggs

Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Rock Cakes

Oven, in the book's wordsA moderate oven

Ingredients

Directions

The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.

Prepare

Preheat the oven to 350°F (175°C).

Make the dough

Rub the butter into the flour.
Add the moist sugar and sultanas.
Beat the eggs well and add them to the mixture.
Mix until thoroughly incorporated.

Bake

Drop the mixture in lumps onto a buttered baking tin.
Bake for 30 minutes.

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.

Butter + flourtop 12% of all pairs

Smell alikelow

Cooked together124,287 recipes

Shared aroma: isobutyraldehyde (malty, green).
Sugar + flourtop 15% of all pairs

Smell alikemoderate

Cooked together92,116 recipes

Shared aroma: phenylacetaldehyde (hawthorne, honey).
Flour + eggtop 15% of all pairs

Smell alikelow

Cooked together106,462 recipes

Shared aroma: isobutyraldehyde (malty, green).
Butter + eggtop 17% of all pairs

Smell alikemoderate

Cooked together118,967 recipes

Shared aroma: decanal (soap, orange peel).
Butter + sugartop 17% of all pairs

Smell alikemoderate

Cooked together98,233 recipes

Shared aroma: guaiacol (smoky, sweet).

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 to make the mixture tender and rich.
Flour: Forms the main structure of the cakes as the mixture sets in the oven.
Moist sugar: Adds sweetness and moisture, and helps the cakes brown as they bake.
Sultanas: Add chewy pockets of sweetness and fruitiness throughout the cakes.
Eggs: Bind the mixture and add richness and structure as they set in the oven.

“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.