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
Mix ingredients in the order given.
Cook in a double boiler until thick.
Cool before spreading.
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.
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Orange + lemontop 1% of all pairsSmell alikestrongCooked together10,634 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + lemontop 16% of all pairsSmell alikemoderateCooked 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 as it cooks and helps the filling set.
- Flour
- Thickens the liquid as it cooks, giving the filling body.
- Sugar
- Sweetens the filling and balances the sharpness of the citrus.
- Butter
- Adds richness and a smooth, silky mouthfeel.
- Orange juice
- Provides the main liquid and the citrus flavor of the filling.
The step that matters
Cook in a double boiler until thick. Egg proteins set at high heat and can curdle or scramble if heated too quickly. Gentle, indirect heat from a double boiler thickens the filling smoothly while the flour gelatinises.
Swap the orange
How well each one fits the dish's main ingredients (sugar, egg, flour, butter, lemon):
- Raisinfits better
- Vanillafits better
- Figfits about as well
- Orangethe original
Fit is the average pairing score against sugar, egg, flour, butter, lemon. 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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