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Dessert

Lemon Pie

A lemon custard pie topped with a sweet meringue.

From an old cookbook · modernised transcription
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Why it works: Lemon and corn are a kitchen classic. They rank in the top 13% of all ingredient pairs, and cooks put them together in 1,927 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.

Make the filling

  1. In a double boiler, mix lemon juice, lemon rind, sugar, eggs, corn starch, and water.

  2. Cook until thick, stirring frequently.

Assemble and bake

  1. Pre-bake the pie crust until golden.

  2. Pour the lemon filling into the crust.

  3. Beat the egg whites until stiff, then spread over the filling with a little sugar.

  4. Return to a 350°F (175°C) oven and brown the meringue.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Lemon + corntop 13% of all pairs
    Smell alikemoderate
    Cooked together1,927 recipes

    Shared aroma: 2-nonenal (fatty, green).

  2. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

  3. Lemon + eggtop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

  4. Sugar + eggtop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

    Shared aroma: 2-nonenal (fatty, green).

  5. Sugar + corntop 21% of all pairs
    Smell alikelow
    Cooked together7,168 recipes

    Shared aroma: 2-nonenal (fatty, green).

Lemon and sugar 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

Corn starch
Thickens the filling as it heats, giving the set custard body.
Eggs
Help thicken the filling and whip into the meringue topping for structure.
Lemon juice
Provides the sharp acidity that defines the lemon flavor.
Sugar
Sweetens the filling and helps stabilize the meringue.
Lemon rind
Adds concentrated lemon aroma from the oils in the peel.

The step that matters

Cook the filling until thick. Cornstarch thickens only once the mixture is hot enough for its granules to swell and set. Stopping early leaves the filling runny, while frequent stirring keeps it smooth and prevents scorching or lumps.

Swap the lemon

How well each one fits the dish's main ingredients (sugar, egg, corn):

  1. Vanillafits better
  2. Coconutfits about as well
  3. Raisinfits about as well
  4. Lemonthe original

Fit is the average pairing score against sugar, egg, corn. 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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