Why it works: Lemon and almond match in chemistry and in kitchens. They rank in the top 10% of all ingredient pairs, and cooks put them together in 5,655 recipes. Both carry eucalyptol, which smells eucalyptus, herbal. The science ↓
Apple-cake
Ingredients
Directions
Make the apple custard
Beat the egg in a bowl until light.
Add sugar, lemon juice, and lemon rind to the egg, mixing well.
Grate the apples directly into the mixture, stirring each one in before adding another.
Transfer the mixture to a saucepan and heat over medium until boiling and thick.
Assemble
Cool the apple-custard and spread it between layers of cake.
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.
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 + almondtop 10% of all pairsSmell alikestrongCooked together5,655 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Lemon + appletop 14% of all pairsSmell alikemoderateCooked together7,551 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Apple + almondtop 15% of all pairsSmell alikemoderateCooked together1,025 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Sugar + almondtop 18% of all pairsSmell alikemoderateCooked together15,679 recipes
Shared aroma: 1-penten-3-one (fish, pungent).
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Sugar + appletop 18% of all pairsSmell alikelowCooked together16,478 recipes
Shared aroma: beta-damascenone (apple, rose).
Sugar and apple barely smell alike, yet cooks put them together in 16,478 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
- Thickens the custard as it heats and adds richness and structure.
- Sugar
- Sweetens the filling and helps give it a smooth, glossy texture.
- Tart apples
- Provide the bulk of the filling and a tart, fruity flavour that balances the sweetness.
- Lemon
- Adds acidity and aroma, brightening the flavour of the apple custard.
The step that matters
Heating the custard until thick. Egg proteins set as they heat, thickening the mixture. Heating too gently leaves it runny, while overheating can curdle the egg and make it grainy.
Swap the apple
How well each one fits the dish's main ingredients (egg, sugar, lemon, almond):
- Vanillafits better
- Orangefits better
- Raisinfits better
- Applethe original
Fit is the average pairing score against egg, sugar, lemon, almond. 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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