Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Orange Layer Cake
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.
Make the batter
Cream together the butter and sugar until light and fluffy.
Add the beaten egg yolks and mix well.
Grate the rind and scoop out the pulp and juice from the oranges, adding enough water to make 1 cup.
Add the orange mixture to the butter and eggs, alternating with the sifted flour.
Fold in the stiffly whipped egg whites, salt, and baking powder.
Bake the layers
Divide the batter into three layers and bake at 350°F (175°C) until golden.
Make the filling
For the filling, beat the egg until light and thick.
Add the grated orange rind, half of the strained orange juice, and enough powdered sugar to make a thick mixture.
For a cooked filling, scald the milk in a double boiler.
In a bowl, beat together the sugar, cornstarch, and egg yolks until light.
Stir the mixture into the hot milk and cook until thickened, about 5 minutes.
Remove from heat and add the grated orange rind and juice.
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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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).
Butter and flour 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
- Butter
- Creams with sugar to trap air, giving a tender, fine-textured crumb with richness.
- Egg yolks
- Add richness, fat and emulsifying power that help the batter bind and stay moist.
- Egg whites
- Whipped to foam, they lighten the batter and help the layers rise and set.
- Flour
- Forms the structure of the cake that holds the layers together as they bake.
- Baking powder
- Releases gas when heated, helping the layers rise and become light.
- Cornstarch
- Thickens the cooked filling into a smooth, sliceable custard.
The step that matters
Stir the egg mixture into the hot milk and cook until thickened. Egg yolks can curdle or scramble if added to very hot liquid too quickly. Adding the hot milk gradually and cooking gently lets the cornstarch and yolks thicken the filling smoothly.
Swap the orange
How well each one fits the dish's main ingredients (butter, sugar, egg, flour, milk):
- Vanillafits better
- Raisinfits better
- Figfits better
- Orangethe original
Fit is the average pairing score against butter, 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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