Why it works: Lemon and orange match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 10,634 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓
Orange Cake
Ingredients
Directions
Make the batter
Mix sugar with egg yolks until well combined.
Add beaten egg whites and mix gently.
Incorporate butter and milk.
Add flour until the batter is thick like pound cake.
Stir in baking powder and lemon extract.
Pour batter into jelly pans.
Bake until golden.
Make the filling
For the filling, grate the rinds of the oranges and lemon.
Combine the grated rinds with their juice, water, sugar, and cornstarch in a saucepan.
Boil until smooth.
Cool before spreading between the cake layers.
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.
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Lemon + orangetop 1% of all pairsSmell alikestrongCooked together10,634 recipes
Shared aroma: 3-hexenal (apple, fruity).
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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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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Milk + flourtop 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).
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
- Eggs
- Whites add lift and airy structure, while yolks add richness and help bind the batter.
- Flour
- Forms the structure of the cake as its proteins set during baking.
- Baking powder
- Releases gas when heated, helping the cake rise and become light.
- Sugar
- Sweetens the cake and helps it brown while tenderizing the crumb.
- Butter
- Adds fat for tenderness and flavor in the cake.
- Cornstarch
- Thickens the orange and lemon filling into a smooth, spreadable custard-like mixture.
The step that matters
Boil the filling until smooth. Cornstarch only thickens fully once it reaches a boil and its starch granules swell and gelatinize. Stopping early leaves a thin, gritty filling that will not hold between the layers.
Swap the orange
How well each one fits the dish's main ingredients (sugar, egg, butter, milk, flour, lemon):
- Vanillafits better
- Raisinfits better
- Figfits better
- Orangethe original
Fit is the average pairing score against sugar, egg, butter, milk, flour, lemon. 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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