Why it works: Sugar and vanilla are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 35,032 recipes. Both carry beta-damascenone, which smells apple, rose. 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.
Make the filling
Mix the flour and sugar together.
Add the beaten egg yolks, lemon juice, and a small amount of grated lemon rind.
Stir in the cold water.
Pour the mixture into a double boiler and cook until it thickens and becomes clear.
Pour the filling into a pre-baked pie crust.
Top and bake
For the meringue, beat the egg whites with 1-2 tablespoons of sugar and a little vanilla until stiff peaks form.
Spread the meringue over the pie filling and brown slightly in a 350°F (175°C) oven.
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 + vanillatop 8% of all pairsSmell alikelowCooked together35,032 recipes
Shared aroma: beta-damascenone (apple, rose).
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Coffee + vanillatop 9% of all pairsSmell alikemoderateCooked together1,391 recipes
Shared aroma: sotolon (curry, maple).
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Flour + vanillatop 12% of all pairsSmell alikemoderateCooked together19,241 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Lemon + vanillatop 15% of all pairsSmell alikemoderateCooked together5,961 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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 as they set with the heat.
- Flour
- Thickens the lemon filling so it holds its shape when sliced.
- Sugar
- Sweetens the filling and balances the sharp lemon acidity.
- Lemon
- Provides the sour flavour and aroma of the filling, from juice and rind.
- Egg whites
- Whip into a foam that forms the light, stable meringue topping.
The step that matters
Cooking the filling until it thickens. Flour starch and egg yolk proteins must be cooked fully to thicken the filling. Undercooked, it stays runny and can soften the crust and meringue. Stirring gently in a double boiler helps prevent lumps and scorching.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, coffee, egg, flour, vanilla):
- Raisinfits better
- Figfits better
- Blueberryfits better
- Lemonthe original
Fit is the average pairing score against sugar, coffee, egg, flour, vanilla. 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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