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 ↓
Sultana Cake
Ingredients
Directions
The book says “a good steady oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the batter
Preheat the oven to 350°F (175°C).
In a bowl, cream the butter and sugar together until light and fluffy.
Beat in the eggs one at a time.
Sift the flour and baking powder together, then fold into the mixture.
Add the sultanas, grated lemon rind, and candied peel, mixing well.
Add a little milk to achieve a smooth batter.
Bake
Pour the batter into a greased cake pan.
Bake for about 1 hour or until a skewer inserted comes out clean.
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).
-
Flour + buttertop 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).
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
- Butter
- Creamed with sugar to trap air, giving the cake a tender, rich texture.
- Eggs
- Add structure and richness as they set in the baked crumb.
- Flour
- Forms the main structure of the cake as it sets in the oven.
- Baking powder
- Releases gas in the batter, helping the cake rise and become light.
- Castor sugar
- Creams with butter to aerate the batter and adds sweetness and browning.
- Sultanas
- Add chewy pockets of sweetness and moisture throughout the cake.
The step that matters
Beating in the eggs one at a time. Adding eggs gradually lets each one emulsify fully into the creamed butter and sugar. Adding them all at once can cause curdling, which may leave a coarser, denser crumb.
Swap the lemon
How well each one fits the dish's main ingredients (flour, butter, sugar, egg, milk):
- Vanillafits better
- Raisinfits better
- Figfits better
- Lemonthe original
Fit is the average pairing score against flour, butter, 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.
You might also like
The 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.

Lemon Cake228 recipes
Lemon Ice147 recipes
Lemon Sherbet103 recipes
Lemon Custard64 recipes