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 ↓
White Fruit 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.
Make the batter
Preheat the oven to 350°F (175°C).
In a large bowl, cream the butter and sugar together until light and fluffy.
Add the egg whites and mix well.
Stir in the sweet milk and baking powder.
Gradually add the flour, mixing until combined.
Fold in the citron and grated coconut last.
Bake
Pour the batter into a greased cake pan and bake for about 1 hour or until a toothpick 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).
-
Milk + coconuttop 10% of all pairsSmell alikemoderateCooked together2,648 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Butter + coconuttop 12% of all pairsSmell alikemoderateCooked together3,467 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Milk + flourtop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, 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
- Creamed with sugar to trap air, giving the cake a light, tender crumb and rich flavor.
- Egg whites
- Add structure and help the cake set as they cook, supporting its rise.
- Flour
- Forms the main structure of the cake once its proteins set in the oven.
- Baking powder
- Releases gas during baking, helping the cake rise and become airy.
- Sugar
- Creams with butter for aeration and adds sweetness and gentle browning.
- Grated coconut
- Adds moisture, chew and a distinct coconut aroma to the crumb.
The step that matters
Folding in the citron and coconut. Folding gently keeps the air trapped in the batter. Overmixing develops gluten in the flour, making the cake dense and tough.
Swap the coconut
How well each one fits the dish's main ingredients (sugar, egg, butter, milk, flour):
- Vanillafits better
- Raisinfits better
- Figfits about as well
- Coconutthe original
Fit is the average pairing score against sugar, egg, butter, milk, flour. 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.

Delicate Cake246 recipes
Boiled Frosting69 recipes
Citron Cake68 recipes
Scotch Cake63 recipes