Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Baked Apple Pudding, or Custard
Ingredients
Directions
The book says “a moderate oven”. The 350°F in the steps is the modern equivalent, not the book's own figure.
Make the filling
Stew the apples with water and sugar until smooth, stirring often to prevent sticking.
Mix in the hot butter, lemon rind, and juice.
Gradually stir in the beaten egg yolks and flour or crushed biscuits.
Bake and serve
Bake in a moderate oven (350°F / 175°C) for 30 minutes or until firm in the middle.
Pour a little clarified butter on top.
Sprinkle with sugar before serving.
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 + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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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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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eggs
- Yolks thicken the custard as they set, giving it a firm, sliceable body.
- Butter
- Adds richness and a smooth, silky mouthfeel to the custard.
- Apples
- Stewed to a smooth pulp, they form the fruit base of the custard.
- Sugar
- Sweetens the custard and helps balance the tartness of the apples and lemon.
- Flour or crushed biscuits
- Starch or crumbs help stabilise the custard so it holds its shape when baked.
The step that matters
Gradually stir in the beaten egg yolks. Adding the yolks slowly to the warm apple mixture tempers them, so they blend in evenly instead of scrambling. Gentle heat then lets the yolk proteins set into a smooth, firm custard.
Swap the apple
How well each one fits the dish's main ingredients (sugar, butter, lemon, egg, flour):
- Raisinfits better
- Vanillafits better
- Figfits better
- Applethe original
Fit is the average pairing score against sugar, butter, lemon, egg, flour. 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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