Why it works: Sugar and flour are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 92,116 recipes. Both carry phenylacetaldehyde, which smells hawthorne, honey. The science ↓
Lemon Pie
Ingredients
Directions
The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Peel and slice the lemon.
Prepare the crust on a pie plate.
Assemble the filling
Place the sugar in the crust and layer the sliced lemon on top.
Chop the lemon peel finely and spread it over the lemon slices.
Dust the flour over the top.
Drizzle the water over the entire mixture before adding the top crust.
Bake
Bake in a hot oven at 400°F (200°C) until golden.
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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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Lemon + flourtop 17% of all pairsSmell alikemoderateCooked together30,404 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Lemon + sugartop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
Lemon and sugar barely smell alike, yet cooks put them together in 53,532 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
- Lemon
- Provides the main tart flavor, acidity and aroma from its juice and peel.
- Sugar
- Sweetens the filling and balances the lemon's sourness.
- Flour
- Thickens the lemon juices as the pie bakes.
- Water
- Adds moisture so the sugar and flour can dissolve into the filling.
The step that matters
Drizzling the water before the top crust. The flour needs liquid to thicken the juices as the pie bakes. Without enough moisture spread through the filling, it can stay pasty in spots or run thin when cut.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, flour):
- Raisinfits better
- Vanillafits better
- Blueberryfits better
- Lemonthe original
Fit is the average pairing score against sugar, flour. 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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