Why it works: Flour and milk are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 78,219 recipes. Both carry isobutyraldehyde, which smells malty, 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. The book gives no cooking times either; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.
Prepare the custard
Preheat the oven to 350°F (175°C).
In a bowl, mix the lemon juice, lemon rind, sugar, egg yolks, flour, and milk until smooth.
Line a pie dish with pastry and pour in the custard mixture.
Bake until set, about 25-30 minutes.
Make the meringue and finish
In another bowl, beat the egg whites until soft peaks form.
Gradually add the powdered sugar and continue beating until stiff peaks form.
Spread the meringue over the baked pie and lightly brown it in the 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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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Lemon + milktop 15% of all pairsSmell alikemoderateCooked together19,053 recipes
Shared aroma: 2-nonenal (fatty, green).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Lemon + flourtop 17% of all pairsSmell alikemoderateCooked together30,404 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and milk barely smell alike, yet cooks put them together in 78,219 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 custard and enrich it, helping it set when baked.
- Egg whites
- Whipped into foam to form the airy, stable meringue topping.
- Flour
- Stabilizes the lemon filling so it thickens rather than running loose.
- Sugar
- Sweetens the tart lemon and helps stabilize the whipped meringue.
- Lemon
- Provides the acidity and aroma that define the filling.
The step that matters
Beating the egg whites to stiff peaks. Egg whites must be whipped until stiff with sugar added gradually; under-whipped or greasy whites will weep or collapse, and the meringue will not hold its shape while browning.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, egg, flour, milk):
- Vanillafits better
- Raisinfits better
- Figfits better
- Lemonthe original
Fit is the average pairing score against sugar, egg, flour, milk. 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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