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Invalid Fruit Pie

A fruit pie made with sponge cake layers and a milk‑egg custard.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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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 Fruit Pie

Oven, in the book's wordsA moderate oven

Ingredients

Directions

The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.

Prepare

  1. Cut the sponge cakes into thin slices.

  2. Line a buttered pie dish with some of the slices.

Make the custard

  1. Boil the milk, then remove from heat.

  2. Stir in the egg and beat well.

Assemble and bake

  1. Fill with alternate layers of fruit pulp and sponge cake.

  2. Pour the mixture into the pie dish.

  3. Bake at 350°F (175°C) for 15 minutes.

  4. Dredge with sugar.

  5. Serve.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Apple + milktop 11% of all pairs
    Smell alikemoderate
    Cooked together4,104 recipes

    Shared aroma: 4-heptenal (creamy, biscuit).

  2. Apple + sugartop 18% of all pairs
    Smell alikelow
    Cooked together16,478 recipes

    Shared aroma: beta-damascenone (apple, rose).

  3. Milk + eggtop 18% of all pairs
    Smell alikemoderate
    Cooked together88,785 recipes

    Shared aroma: 2-nonenal (fatty, green).

  4. Milk + sugartop 18% of all pairs
    Smell alikelow
    Cooked together77,875 recipes

    Shared aroma: 2-nonenal (fatty, green).

  5. Egg + sugartop 21% of all pairs
    Smell alikemoderate
    Cooked 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

Sponge cakes
Form the base and layers, soaking up the custard to give a soft, cake-like texture.
Apples or pears
Add fruit flavour and moisture, with the sieved pulp keeping the filling smooth.
Milk
Forms the liquid base of the custard, adding moisture and softness.
Egg
Thickens the milk mixture as it sets in the oven, holding the pie together.

The step that matters

Stir in the egg. Eggs thicken when heated but scramble if the milk is too hot. Removing the milk from heat before adding the egg lets the custard set smoothly in the oven.

Swap the apple

How well each one fits the dish's main ingredients (milk, egg, sugar):

  1. Vanillafits better
  2. Figfits better
  3. Raisinfits better
  4. 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.

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