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 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
Separate the yolks from the whites of the eggs.
Grate the rind of the lemons.
Extract the juice of the lemons.
Make the filling
Mix the yolks with the sugar and lemon juice.
Pour the mixture into a pie crust.
Bake at 350°F (175°C) until set.
Top and finish
Whip the egg whites with the reserved sugar until stiff peaks form.
Spread the meringue over the baked pie.
Return to the oven to lightly 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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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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Egg + sugartop 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
- Eggs
- Yolks thicken the lemon filling and whites whip into the meringue topping.
- Sugar
- Sweetens the filling and stabilizes the whipped egg white meringue.
- Lemon juice
- Provides the sharp acidity that balances the sweetness of the filling.
- Lemon rind
- Adds concentrated lemon aroma from the aromatic oils in the peel.
The step that matters
Bake the filling until set. Underbaked yolk filling stays runny, while overbaking can make it weep or toughen, so the filling needs to be set but not overcooked.
Swap the lemon
How well each one fits the dish's main ingredients (egg, sugar):
- Vanillafits better
- Raisinfits about as well
- Lemonthe original
- Datesfits less well
Fit is the average pairing score against egg, sugar. 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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