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 ↓
Baked Apple Custard
Ingredients
Directions
The book gives no oven temperature. The 300°F (150°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare the custard
Mash the stewed apples through a colander.
Add sugar, eggs, melted butter, and lemon juice and pulp to the mashed apples. Mix the ingredients well.
Bake and serve
Fill pie pans with pastry and pour the custard mixture in.
Bake in a slow oven at 300°F (150°C) until set.
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).
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Butter + lemontop 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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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
- Eggs
- Set the custard into a firm, sliceable filling as they cook.
- Sugar
- Sweetens the filling and balances the tartness of the apples and lemon.
- Melted butter
- Adds richness and a smooth, tender texture to the custard.
- Stewed apples
- Provide the bulk, moisture and apple flavour of the filling.
- Lemons
- Add acidity and bright aroma that cut through the sweetness.
The step that matters
Bake until set. Eggs thicken as their proteins coagulate with heat. Underbaking leaves the custard runny, while a hot oven can overcook it, making it curdle or weep. A slow oven and a check for a firm centre help it set evenly.
Swap the apple
How well each one fits the dish's main ingredients (sugar, egg, butter, lemon):
- Vanillafits better
- Orangefits better
- Raspberryfits better
- Applethe original
Fit is the average pairing score against sugar, egg, 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.
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