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Dessert

Lemon Pie

A baked lemon custard pie topped with meringue.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Lemon and butter are a kitchen classic. They rank in the top 16% of all ingredient pairs, and cooks put them together in 41,227 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓

Lemon Pie

Ingredients

Directions

The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.

Make the filling

  1. Preheat oven to 400°F (200°C).

  2. Beat sugar and 3 eggs until light.

  3. Add grated lemon rind and lemon juice, then stir in cornstarch.

  4. Place mixture in a heatproof vessel in hot water and stir continually until thick.

  5. Add butter just before removing from heat and stir until melted.

Assemble and bake

  1. Pour filling into pre-baked pie shell.

  2. Top with meringue made from reserved egg whites and bake until browned.

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 + buttertop 16% of all pairs
    Smell alikemoderate
    Cooked together41,227 recipes

    Shared aroma: 3-hexenal (apple, fruity).

  2. Egg + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

  3. Sugar + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

  4. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

  5. Egg + lemontop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

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

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
Thicken the filling as they set and give it a rich, custardy body.
Sugar
Sweetens the filling and balances the sharpness of the lemon juice.
Lemon juice
Provides the sour, bright flavour that defines the pie.
Cornstarch
Thickens the filling by swelling in heat, giving it a sliceable set.
Butter
Adds richness and a smooth, glossy texture to the finished filling.

The step that matters

Stir the filling continually over hot water until thick. Egg proteins and starch thicken only with gentle, steady heat. If the mixture is left still or gets too hot, the eggs can scramble and the filling can turn lumpy or grainy.

Swap the lemon

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

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

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