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 ↓
Lemon Sponge 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 filling
Preheat the oven to 350°F (175°C).
In a bowl, beat together the flour, butter, sugar, egg yolks, and lemon juice and rind.
Add the milk and stir well.
In a separate bowl, whip the egg whites to a stiff froth and gently fold them into the mixture.
Bake
Pour the mixture into a deep pie plate lined with pie crust.
Bake until a sharp knife inserted comes out clean.
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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Flour + buttertop 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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Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Milk + lemontop 15% of all pairsSmell alikemoderateCooked together19,053 recipes
Shared aroma: 2-nonenal (fatty, 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
- Eggs
- Yolks thicken the filling and whites, whipped and folded in, give the pie its light, sponge-like rise.
- Flour
- Starch thickens the filling and helps it set as it bakes.
- Sugar
- Adds sweetness and helps tenderize the custard texture.
- Butter
- Adds fat for richness and a softer, smoother texture.
- Milk
- Provides liquid that gives the filling its custard-like body.
- Lemon
- Juice and rind add acidity and bright lemon aroma to the filling.
The step that matters
Folding in the egg whites. Whipped egg whites trap air that gives the sponge its lift. Folding gently keeps that air in; stirring hard deflates the foam and leaves a dense pie.
Swap the lemon
How well each one fits the dish's main ingredients (flour, butter, sugar, egg, milk):
- Vanillafits better
- Raisinfits better
- Figfits better
- Lemonthe original
Fit is the average pairing score against flour, butter, sugar, egg, 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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