Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Apple Custard Pie
Ingredients
Directions
Prepare the filling
Pare, core, and cook the apples until soft.
Mash the cooked apples with a fork.
Add sugar, butter, nutmeg, salt, and cornstarch mixed with a little milk to the apples.
Beat the yolks of the eggs in a cup. Add enough milk to fill the cup.
Pour the mixture over the apples.
Mix everything well and cook on the stove until combined.
Bake and top
Line a pie tin with the crust. Bake the crust until golden.
Pour the custard mixture into the baked crust.
Beat the egg whites with sugar until stiff peaks form. Spread the meringue over the pie.
Brown the meringue in the oven.
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Apple + milktop 11% of all pairsSmell alikemoderateCooked together4,104 recipes
Shared aroma: 4-heptenal (creamy, biscuit).
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Apple + nutmegtop 12% of all pairsSmell alikemoderateCooked together3,790 recipes
Shared aroma: estragole (anise, licorice).
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Apple + buttertop 14% of all pairsSmell alikemoderateCooked together8,706 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Nutmeg + milktop 15% of all pairsSmell alikemoderateCooked together14,685 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Apples
- Provide the bulk of the filling and their pectin and acidity help the filling set and taste fresh.
- Eggs
- Yolks thicken the custard as they set, while whites whip into the meringue topping.
- Cornstarch
- Starch thickens the milk and apple mixture as it cooks, giving a sliceable filling.
- Sugar
- Sweetens the filling and helps the meringue whip into a stable, glossy foam.
- Milk
- Adds liquid and richness to the custard, which thickens with the eggs and starch.
The step that matters
Cooking the filling on the stove. Cornstarch and egg yolks only thicken once the mixture reaches a simmer and stays there briefly. Undercooked, the custard stays runny and may not set after baking.
Swap the apple
How well each one fits the dish's main ingredients (sugar, butter, nutmeg, milk, egg):
- Vanillafits better
- Figfits better
- Lemonfits better
- Applethe original
Fit is the average pairing score against sugar, butter, nutmeg, milk, 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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