Why it works: Corn and lemon are a kitchen classic. They rank in the top 13% of all ingredient pairs, and cooks put them together in 1,927 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Lemon Pie
Ingredients
Directions
Make the filling
In a pot, stir corn starch and sugar into boiling water with a pinch of salt.
Let the mixture cool.
Add lemon juice, lemon rind, and egg yolk to the cooled mixture.
Pour into a pie crust and bake until set.
Top and brown
Beat the egg white until stiff, then mix in sugar.
Spread the egg white mixture over the pie and return to the oven to 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.
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Corn + lemontop 13% of all pairsSmell alikemoderateCooked together1,927 recipes
Shared aroma: 2-nonenal (fatty, green).
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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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Lemon + eggtop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
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Sugar + eggtop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
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Corn + sugartop 21% of all pairsSmell alikelowCooked together7,168 recipes
Shared aroma: 2-nonenal (fatty, green).
Sugar and lemon 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
- Corn starch
- Thickens the boiled liquid into a smooth, sliceable lemon filling as it cooks and cools.
- Egg yolk
- Adds richness and helps the filling set firm when baked.
- Egg white
- Whipped with sugar to form a stable meringue that browns on top.
- Lemon juice
- Provides the sharp acidity that defines the pie's flavor.
The step that matters
Let the mixture cool before adding the egg yolk. Adding egg yolk to a hot starch mixture can scramble it and thin the filling. Cooling first keeps the yolk smooth and lets the starch set properly.
Swap the lemon
How well each one fits the dish's main ingredients (corn, sugar, egg):
- Vanillafits better
- Coconutfits about as well
- Raisinfits about as well
- Lemonthe original
Fit is the average pairing score against corn, sugar, egg. 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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