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Dessert

Orange Filling

A sweet orange custard used as a cake filling.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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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 saucepan, combine egg yolks, sugar, flour, orange juice, orange rind, lemon juice, lemon rind, and butter.

  2. Boil the mixture over medium heat, stirring constantly, until it thickens.

Finish

  1. Allow the filling to cool before spreading it on the cake.

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. Lemon + walnuttop 10% of all pairs
    Smell alikestrong
    Cooked together2,149 recipes

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

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

    Shared aroma: isobutyraldehyde (malty, green).

  4. Orange + walnuttop 12% of all pairs
    Smell alikemoderate
    Cooked together1,058 recipes

    Shared aroma: 2,4-nonadienal (fatty, green).

  5. Flour + walnuttop 12% of all pairs
    Smell alikemoderate
    Cooked together5,873 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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 yolks
Thicken the filling as they set with heat, giving it a rich, custard-like body.
Sugar
Sweetens the filling and helps balance the sharpness of the citrus juice.
Flour
Stabilizes the filling so it thickens and holds its shape when cooled.
Orange juice
Provides the main citrus flavor and liquid that cooks into the filling.
Lemon juice
Adds acidity that brightens the flavor and sharpens the citrus taste.
Butter
Adds fat for a smoother texture and a richer mouthfeel.

The step that matters

Boil the mixture while stirring constantly. Egg yolks can curdle or scramble if overheated or left unstirred. Constant stirring spreads heat evenly, and the starch from the flour thickens the mixture as it comes to a boil.

Swap the orange

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

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

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