Why it works: Apple and butter are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 8,706 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Apple Filling
Ingredients
Directions
Place the sliced apples in a pot over medium heat with sugar to taste.
Cook until the apples are tender, then remove from heat.
Rub the cooked apples through a fine sieve.
Stir in the butter until well combined.
Allow the mixture to cool before using it to spread between 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.
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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Apple + buttertop 14% of all pairsSmell alikemoderateCooked together8,706 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
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Apple + sugartop 18% of all pairsSmell alikelowCooked together16,478 recipes
Shared aroma: beta-damascenone (apple, rose).
Apple and sugar 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
- Tart apples
- Provide the main body and tart flavour of the filling as they soften when cooked.
- Sugar
- Adds sweetness to balance the tartness of the apples.
- Butter
- Adds richness and a smooth, silky mouthfeel to the puréed apples.
The step that matters
Rub the cooked apples through a fine sieve. Apples must be fully tender before sieving, otherwise the purée stays grainy and lumpy. Pushing them through a fine sieve removes skins and fibrous bits, giving the smooth texture a cake filling needs.
Swap the apple
How well each one fits the dish's main ingredients (sugar, butter):
- Vanillafits better
- Figfits about as well
- Peachfits about as well
- Applethe original
Fit is the average pairing score against sugar, 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.
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