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 ↓
A Delicious 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 the filling
Preheat the oven to 350°F (175°C).
Juice the lemon and grate its rind.
In a bowl, mix the lemon juice, grated rind, egg yolks, sugar, flour, and enough milk to fill the dish.
Pour the mixture into a pie dish.
Bake until brown.
Make and add the meringue
In another bowl, beat the egg whites until stiff peaks form.
Gradually add 4 tablespoons of sugar to the egg whites and continue beating until glossy.
Spread the meringue over the baked pie.
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).
-
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 filling and add richness as they set during baking.
- Egg whites
- Whip into a stiff foam that forms the light, glossy meringue topping.
- Sugar
- Sweetens the filling and helps stabilise the whipped egg white meringue.
- Flour
- Thickens the lemon filling so it holds its shape when sliced.
- Lemon
- Provides the acidity and aroma that define the filling's tangy flavour.
The step that matters
Beating the egg whites until stiff peaks form. Egg whites need to be fully whipped to hold air; under-beaten whites will weep or collapse, and any trace of fat or yolk in the bowl will stop them from whipping properly.
Swap the lemon
How well each one fits the dish's main ingredients (egg, sugar, flour, milk):
- Vanillafits better
- Raisinfits better
- Figfits better
- Lemonthe original
Fit is the average pairing score against egg, sugar, 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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