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Dessert

Apple Filling

A sweet apple filling made by cooking sliced tart apples with sugar, sieving, and adding butter, used between cake layers.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 ingredients
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Why it works: Apple and butter are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 8,706 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Apple Filling

Ingredients

Directions

Prepare the apples

  1. Peel and slice the green tart apples.

  2. Cook the apples in a saucepan over medium heat with sugar to taste until tender.

Make the filling

  1. Remove from heat and rub the apples through a fine sieve.

  2. Stir in a small piece of butter until melted.

Finish the cake

  1. Let the mixture cool before using it to spread between cake layers.

  2. Cover the cake with plenty of sugar.

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 + buttertop 14% of all pairs
    Smell alikemoderate
    Cooked together8,706 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

  2. Sugar + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

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

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

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

Green tart apples
Provide the bulk of the filling, with pectin for thickening and tartness for balance.
Sugar
Sweetens the apples and balances their tartness while helping them soften and thicken.
Butter
Adds fat for richness and a smoother, silkier texture in the purée.

The step that matters

Let the mixture cool before spreading. Spreading a warm filling can soften the cake layers and make them slide or turn soggy. As the purée cools, it thickens to a spreadable texture that holds its place between layers.

Swap the apple

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

  1. Vanillafits better
  2. Figfits about as well
  3. Peachfits about as well
  4. Applethe original

Fit is the average pairing score against sugar, butter. 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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