Why it works: Flour and milk are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 78,219 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Orange Pie
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare the custard
Preheat the oven to 350°F (175°C).
In a bowl, mix the juice and rind of the orange, sugar, egg yolks, flour, and milk until smooth.
Line a pie dish with the crust and pour in the orange custard mixture.
Bake until set.
Make the meringue and finish
In another bowl, beat the egg whites until stiff peaks form.
Gradually add the powdered sugar and mix until combined.
Spread the meringue over the pie and lightly brown it in the oven.
Serve once cooled.
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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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 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).
-
Orange + milktop 15% of all pairsSmell alikemoderateCooked together4,696 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
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Egg + milktop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
Flour and milk barely smell alike, yet cooks put them together in 78,219 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 custard and add richness through their proteins and fat.
- Egg whites
- Whip into a stiff foam that forms the light, airy meringue topping.
- Flour
- Helps thicken the orange custard so it sets smoothly rather than runny.
- Sugar
- Sweetens the custard and helps stabilise the whipped egg whites.
- Orange
- Provides the juice for flavour and acidity, and the rind for aroma.
The step that matters
Gradually add the powdered sugar to the egg whites. Adding sugar slowly while beating lets it dissolve evenly, producing a stable, glossy meringue. Added too fast or too late, the whites can stay grainy or collapse and weep.
Swap the orange
How well each one fits the dish's main ingredients (sugar, egg, flour, milk):
- Vanillafits better
- Raisinfits better
- Figfits better
- Orangethe original
Fit is the average pairing score against sugar, egg, flour, milk. 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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