Why it works: Apple and lemon are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 7,551 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Apple Pie
Ingredients
Directions
The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare the apples
Remove the cores from the halved apples.
In a saucepan, combine sugar, lemon slices, and water; bring to a boil.
Add the apples and cook slowly until clear and tender.
Carefully remove the apples to avoid breaking them.
Boil down the syrup until thick.
Assemble and bake
Place the apples in a pie plate lined with puff pastry.
Brush the apples with egg white and sprinkle with fine sugar.
Bake in a preheated oven at 400°F (200°C) until golden.
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 + lemontop 14% of all pairsSmell alikemoderateCooked together7,551 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Apple + sugartop 18% of all pairsSmell alikelowCooked together16,478 recipes
Shared aroma: beta-damascenone (apple, rose).
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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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Lemon + eggtop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
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Sugar + eggtop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
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
- Apples
- Provide the main filling that softens and turns tender during poaching and baking.
- Sugar
- Sweetens the syrup and helps the apples turn clear and glossy as they cook.
- Puff pastry
- Forms the buttery, flaky crust that holds the apples during baking.
- Egg white
- Brushed on the apples and crust to promote a golden, glossy browning.
- Lemon
- Adds acidity that brightens the flavour and helps the apples keep their shape.
The step that matters
Carefully remove the apples to avoid breaking them. Apples poached in syrup become soft and fragile, so lifting them gently keeps the halves intact for a neat presentation in the pie.
Swap the apple
How well each one fits the dish's main ingredients (sugar, lemon, egg):
- Orangefits better
- Vanillafits better
- Limefits better
- Applethe original
Fit is the average pairing score against sugar, lemon, egg. 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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