Skip to main content
Dessert

Apple Filling for Cake

A simple apple filling for cakes made with grated lemon, apple, sugar, and egg, boiled briefly.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
Jump to recipe ↓

Why it works: Lemon and apple 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 ↓

Apple Filling for Cake

Ingredients

Directions

  1. Combine the grated lemon, grated apple, sugar, and egg in a saucepan.

  2. Boil the mixture for four minutes.

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. Lemon + appletop 14% of all pairs
    Smell alikemoderate
    Cooked together7,551 recipes

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

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

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

  3. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

  4. Lemon + eggtop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

  5. Sugar + eggtop 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

Egg
Sets and thickens the mixture as it cooks, giving the filling body.
Apple
Adds moisture and bulk, and softens into the filling as it cooks.
Sugar
Adds sweetness and helps give the filling its soft, spreadable texture.
Lemon
Adds acidity and bright aroma that balance the sweetness.

The step that matters

Boiling the mixture. The egg must be heated enough to thicken the filling, but boiling too vigorously or too long can curdle the egg and make the texture grainy. Keep the heat controlled and stir throughout.

Swap the apple

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

  1. Orangefits better
  2. Vanillafits better
  3. Limefits better
  4. Applethe original

Fit is the average pairing score against lemon, sugar, egg. 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

Apple PuddingApple Pudding256 recipesLemon CakeLemon Cake228 recipesLemon IceLemon Ice147 recipesLemon SherbetLemon Sherbet103 recipes