Why it works: Apple and milk are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 4,104 recipes. Both carry 4-heptenal, which smells creamy, biscuit. The science ↓
Invalid’s Fruit Tart
Ingredients
Directions
The book gives no oven temperature. The 350°F in the steps was added when the recipe was transcribed, as a starting point.
Prepare the base
Grease a small pie dish.
Layer it with cooked apples.
Add slices of spongecake over the apples.
Make the custard
Boil ½ pint of milk.
Pour it over the beaten yolks of 3 eggs and 1 tablespoon of sugar.
Stir the mixture over low heat until thick, but do not let it boil.
Pour the thickened mixture over the spongecake and apples.
Top and bake
Whip the egg whites with a tiny pinch of salt until stiff.
Pile the whipped egg whites on top of the tart.
Dredge with sugar.
Bake in a moderate oven (350°F / 175°C) until pale 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 + milktop 11% of all pairsSmell alikemoderateCooked together4,104 recipes
Shared aroma: 4-heptenal (creamy, biscuit).
-
Apple + sugartop 18% of all pairsSmell alikelowCooked together16,478 recipes
Shared aroma: beta-damascenone (apple, rose).
-
Milk + eggtop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Milk + sugartop 18% of all pairsSmell alikelowCooked together77,875 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Egg + sugartop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
Apple and sugar barely smell alike, yet cooks put them together in 16,478 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 and whites whip into the stiff topping that sets and browns.
- Milk
- Forms the liquid base of the custard, which thickens into a soft, smooth set when heated gently.
- Spongecake
- Soaks up the custard and holds its shape, giving the tart a soft, layered texture.
- Cooked apples
- Provide moisture and tart fruit flavour beneath the custard and sponge.
- Sugar
- Sweetens the custard and, dredged on top, helps the meringue-like topping brown.
The step that matters
Stirring the custard over low heat. Egg yolks thicken as they warm, but if the custard boils they can curdle and turn grainy. Gentle heat and constant stirring keep it smooth and thick.
Swap the apple
How well each one fits the dish's main ingredients (milk, egg, sugar):
- Vanillafits better
- Figfits better
- Raisinfits better
- Applethe original
Fit is the average pairing score against milk, egg, 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.
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
Apple Cake80 recipes
Apple Meringue75 recipes
Dried Apple Cake51 recipes