Why it works: Sugar and apple are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 16,478 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓
Apple Filling
Ingredients
Directions
Whip the egg white to a very stiff froth.
Gradually add the powdered sugar to the whipped egg white.
Grate the sour apple finely and stir it in gradually.
Use the filling as desired.
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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Sugar + appletop 18% of all pairsSmell alikelowCooked together16,478 recipes
Shared aroma: beta-damascenone (apple, rose).
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Egg + sugartop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
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Egg + appletop 30% of all pairsSmell alikelowCooked together7,461 recipes
Shared aroma: 2,4-decadienal (seaweed).
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 white
- Whipped into a stiff foam, it gives the filling its light, airy structure.
- Powdered sugar
- Dissolves easily into the foam, adding sweetness and helping it hold its shape.
- Sour apple
- Adds moisture and tart acidity that balances the sweetness of the sugar.
The step that matters
Whip the egg white to a very stiff froth. Egg white foam traps air through its proteins. If it is under-whipped or contains any fat, it will not hold volume, and the filling will collapse and turn watery when the apple is folded in.
Swap the apple
How well each one fits the dish's main ingredients (egg, sugar):
- Vanillafits better
- Raisinfits better
- Lemonfits better
- Applethe original
Fit is the average pairing score against egg, sugar. 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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