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 Tarts
Ingredients
Directions
The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the filling
Boil the apples in ½ cup of water until soft.
Sift and beat the apples until smooth, then add the beaten egg yolks, lemon juice, lemon rind, butter, and sugar. Adjust sweetness if necessary.
Line small tart tins with puff pastry and fill with the apple mixture.
Bake and finish
Bake in a preheated oven at 400°F (200°C) for 5 minutes.
Whip the egg whites with 6 tablespoons of powdered sugar and spread over the tarts.
Return to the oven and brown slightly.
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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Butter + appletop 14% of all pairsSmell alikemoderateCooked together8,706 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Apples
- Cooked and beaten to a smooth purée that forms the body of the filling.
- Eggs
- Yolks enrich and thicken the filling; whipped whites form a light, browning topping.
- Butter
- Adds richness and a tender, smooth texture to the filling.
- Sugar
- Sweetens the filling and helps the topping brown when returned to the oven.
- Lemon
- Juice and rind add acidity and bright aroma to balance the sweet apple filling.
- Puff pastry
- Forms the flaky crust that holds the apple filling in each tart.
The step that matters
Returning the tarts to the oven. Meringue-style whipped whites can scorch quickly once they start to colour. Watch closely and stop when they are only lightly browned, because sugar darkens fast at high heat.
Swap the apple
How well each one fits the dish's main ingredients (sugar, butter, egg, lemon):
- Vanillafits better
- Orangefits better
- Raspberryfits better
- Applethe original
Fit is the average pairing score against sugar, butter, egg, 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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