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 ↓
French 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 crust
Preheat the oven to 400°F (200°C).
Line a pie plate with puff pastry and brush it with beaten egg.
Prick the pastry with a fork and bake until light and brown.
Make the filling
In a bowl, mash the baked apples into a puree.
Mix in sugar, butter, lemon rind, and egg yolks.
Cook the mixture for 10 minutes, then pour it into the baked crust.
Finish and bake
Cover with strips of pastry and bake until brown.
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.
-
Apple + lemontop 14% of all pairsSmell alikemoderateCooked together7,551 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Apple + buttertop 14% of all pairsSmell alikemoderateCooked together8,706 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Egg + buttertop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
-
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
- Puff pastry
- Forms the crisp, flaky base and top crust of the pie.
- Baked apples
- Provide the main body, moisture and apple flavour of the filling.
- Egg yolks
- Thicken the apple puree as they cook, giving it a custard-like set.
- Sugar
- Adds sweetness and helps the filling brown lightly in the oven.
- Butter
- Adds richness and a smooth texture to the filling.
The step that matters
Cooking the apple and egg yolk mixture. Egg yolks set when heated, so the mixture must be cooked gently and long enough to thicken. If it is undercooked it may stay runny and soak the crust; overcooked, the yolks can scramble and turn grainy.
Swap the apple
How well each one fits the dish's main ingredients (egg, sugar, butter, lemon):
- Vanillafits better
- Orangefits better
- Raspberryfits better
- Applethe original
Fit is the average pairing score against egg, sugar, butter, 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Apple Pudding256 recipes
Lemon Cake228 recipes
Lemon Ice147 recipes
Lemon Sherbet103 recipes