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 very hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Make the filling
Peel and core the apples, which should be tart.
Cook the apples in the water over low heat until soft.
Beat the cooked apples until smooth, then let cool slightly.
Add the beaten egg yolks, lemon juice, grated rind, and sugar to the apple mixture, adjusting sugar to taste.
Bake and top
Line patty pans with pastry, fill with the apple mixture, and bake for 5 minutes at 400°F (200°C).
Beat the egg whites until stiff, then mix in 2 tablespoons of sugar.
Spread the meringue on top of the tarts, return to the oven, and brown delicately.
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 + buttertop 14% of all pairsSmell alikemoderateCooked together8,706 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Lemon + buttertop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Egg + buttertop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Butter + sugartop 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 apples supply the body and tartness of the filling.
- Eggs
- Yolks thicken the filling as they set; whites whip into a stable meringue.
- Sugar
- Sweetens the filling and helps the meringue whip and hold its shape.
- Lemon
- Juice adds acidity and grated rind adds bright aroma.
The step that matters
Let the apple mixture cool slightly before adding the yolks. A very hot mixture can scramble egg yolks. Cooling slightly lets the yolks blend in smoothly, so the filling thickens gently and stays silky.
Swap the apple
How well each one fits the dish's main ingredients (egg, lemon, butter, sugar):
- Vanillafits better
- Orangefits better
- Raspberryfits better
- Applethe original
Fit is the average pairing score against egg, lemon, butter, 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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