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Dessert

Orange Filling

A sweet orange custard used as a filling between cake layers.

From an old cookbook · modernised transcription
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Why it works: Orange and lemon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 10,634 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓

Orange Filling

Ingredients

Directions

Make the filling

  1. In a double boiler, combine sugar, flour, grated orange rind, orange juice, lemon juice, and beaten egg.

  2. Cook for ten minutes, stirring constantly.

  3. Remove from heat and stir in butter until melted.

Assemble

  1. Use as a filling between cake layers and cover the top with orange frosting.

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. Orange + lemontop 1% of all pairs
    Smell alikestrong
    Cooked together10,634 recipes

    Shared aroma: 3-hexenal (apple, fruity).

  2. Flour + buttertop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  4. Flour + eggtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  5. Lemon + buttertop 16% of all pairs
    Smell alikemoderate
    Cooked together41,227 recipes

    Shared aroma: 3-hexenal (apple, fruity).

Flour and butter 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

Egg
Thickens the mixture as it cooks and gives the filling body and structure.
Flour
Thickens the juice mixture so the filling sets rather than staying runny.
Sugar
Sweetens the filling and balances the tartness of the citrus juices.
Orange juice
Provides the main orange flavour and liquid for the filling.
Butter
Adds richness and a smooth, glossy finish when stirred into the hot filling.

The step that matters

Cook while stirring constantly. The egg and flour must heat gently while stirred. Stirring spreads the heat evenly so the egg thickens the custard without scrambling or sticking to the pan.

Swap the orange

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

  1. Raisinfits better
  2. Vanillafits better
  3. Figfits about as well
  4. Orangethe original

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