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 ↓
Two Crust Lemon Pie
Ingredients
Directions
The book says “a rather hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Line a pie tin with the bottom crust.
Sprinkle 1 cup of sugar into the crust, then add the grated yellow rind of the lemon.
Peel the white rind from the lemon, slice it thinly, and place it over the sugar.
Sprinkle ½ cup of flour over the lemon slices and add 1 tablespoon of butter.
Pour in 1 cup of cold water and cover with the top crust, sealing the edges tightly.
Bake and serve
Bake in a 400°F (200°C) oven until light brown.
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).
-
Lemon + buttertop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Lemon + flourtop 17% of all pairsSmell alikemoderateCooked together30,404 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
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
- Sugar
- Sweetens the filling and helps balance the sharpness of the lemon.
- Lemon
- Provides the acidity and aroma that flavour the filling.
- Flour
- Thickens the liquid filling so it sets rather than running out.
- Butter
- Adds richness and fat that softens the filling's flavour and texture.
- Pie crust
- Forms the structure that holds the filling and browns in the oven.
The step that matters
Sealing the top crust. Tight sealing keeps steam and juices inside the pie so the filling cooks through and thickens instead of leaking out during baking.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, flour, butter):
- Raisinfits better
- Vanillafits better
- Figfits better
- Lemonthe original
Fit is the average pairing score against sugar, flour, 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.
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