Why it works: Flour and butter are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Orange Pie
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the custard
Preheat the oven to 400°F (200°C).
Grate the rind of one orange.
Juice two large oranges.
In a bowl, mix together the sugar and flour.
Add the egg yolks and melted butter to the mixture. Stir the mixture well.
Pour the mixture into a pie crust.
Bake and top
Bake until it resembles a finely baked custard.
Beat the egg whites until stiff. Add the sugar to the beaten egg whites and mix until combined.
Spread the beaten egg whites over the baked custard.
Return to the oven to brown slightly.
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.
-
Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
-
Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Egg + buttertop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
-
Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
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 custard and add richness through their proteins and fat.
- Egg whites
- Beaten into a stiff foam to form a light topping that browns in the oven.
- Sugar
- Sweetens the filling and, when whipped into the whites, stabilises the meringue topping.
- Flour
- Thickens the filling so it sets into a sliceable custard rather than running.
- Orange juice
- Provides the main citrus flavour and acidity, and liquid for the custard.
- Butter
- Adds fat for a richer, tender custard texture and flavour.
The step that matters
Beating the egg whites until stiff. Egg whites must be beaten until they hold firm peaks, trapping air in the foam. Any trace of fat or yolk prevents this, and under-beaten or collapsed whites will weep or sink into the custard instead of forming a light topping.
Swap the orange
How well each one fits the dish's main ingredients (sugar, flour, egg, butter):
- Raisinfits better
- Vanillafits better
- Figfits better
- Orangethe original
Fit is the average pairing score against sugar, flour, 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.
You might also like
Orange Bundt Cake349 recipes
Orange Cream Rice Pudding121 recipes
Orange Gelatin100 recipes
Orange Sherbet73 recipesThe free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.