Why it works: Sugar and lemon are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Lemon Meringue 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.
Make the filling
In a double boiler, cook sugar and water until boiling.
Combine beaten egg yolks, lemon juice and rind, and cornstarch mixed with water; add to boiling mixture.
Boil until thick, then pour into the baked pie shell.
Top and bake
Beat egg whites until stiff peaks form, then add sugar and spread over the pie.
Bake in a preheated 400°F (200°C) oven until meringue is 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 + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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Egg + lemontop 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).
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
- Egg yolks
- Thicken the filling and add richness to the custard.
- Cornstarch
- Thickens the lemon filling as it boils, giving it a sliceable set.
- Lemon juice and rind
- Provide the tart, bright flavour that balances the sugar.
- Egg whites
- Whip into a foam that forms the meringue topping and browns in the oven.
- Sugar
- Sweetens the filling and, whipped with the egg whites, stabilises the meringue.
The step that matters
Boil the filling until thick. Cornstarch only thickens fully once it reaches a boil and is held there briefly. Undercooked filling stays runny and can weep or soak the crust after it cools.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, egg):
- Vanillafits better
- Raisinfits about as well
- Lemonthe original
- Datesfits less well
Fit is the average pairing score against 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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