Why it works: Flour and butter 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 ↓
Lemon Cake
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.
Make the batter
Whisk the egg whites and flower water for an hour.
Add the sugar and grated lemon rind, mixing well.
In a separate bowl, beat the egg yolks and add the lemon juice.
Combine the yolk mixture with the egg white mixture.
Stir in the flour until well combined.
Bake
Pour the mixture into a buttered pan.
Bake in a moderate oven at 350°F (175°C) for 1 hour.
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 + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Rose + lemontop 13% of all pairsSmell alikelowCooked together1,174 recipes
Shared aroma: decanal (soap, orange peel).
-
Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
-
Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Lemon + buttertop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
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
- Egg whites
- Whisked to foam, they give the cake its light, airy structure.
- Egg yolks
- Add richness and moisture and help bind the batter.
- All-purpose flour
- Its proteins set during baking, giving the cake its firm structure.
- Granulated sugar
- Sweetens the cake and helps keep it tender and moist.
- Lemon juice
- Adds acidity and bright lemon flavour.
The step that matters
Whisking the egg whites. Whites must be beaten until they hold a stable foam; under-whisked or greasy whites collapse, leaving a dense cake, so the foam is what gives the batter its lift.
Swap the lemon
How well each one fits the dish's main ingredients (egg, rose, sugar, flour, butter):
- Raisinfits better
- Vanillafits better
- Lemonthe original
- Figfits about as well
Fit is the average pairing score against egg, rose, sugar, flour, butter. 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 lemon cake recipes
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 Ice147 recipes
Lemon Sherbet103 recipes
Lemon Custard64 recipes
Lemon Water Ice55 recipes