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Lemon Custard Pie

A lemon custard pie topped with meringue.

From an old cookbook · modernised transcription
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Why it works: Butter and lemon 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 Custard 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 custard

  1. In a pot, combine egg yolks, sugar, butter, lemon juice, lemon rind, cornstarch, and boiling water.

  2. Cook over medium heat, stirring constantly, until thick.

  3. Pour the mixture into a baked pie crust.

Top and bake

  1. Beat the egg whites until stiff, then gradually add powdered sugar.

  2. Spread the meringue over the pie.

  3. Bake in a 350°F (175°C) oven 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. Butter + lemontop 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

Egg yolks
Thicken the custard and add richness and a smooth texture.
Cornstarch
Thickens the liquid as it heats, giving the custard body.
Egg whites
Whipped into a stiff foam that forms the light, airy meringue topping.
Sugar
Sweetens the custard and helps stabilize the whipped egg whites.
Lemon juice
Adds acidity that brightens the custard's flavor.

The step that matters

Cook the custard until thick. Cornstarch thickens only when the mixture reaches a full boil and is stirred constantly; undercooked custard stays runny and may not set once cooled, while stirring prevents the egg yolks from scrambling on the hot base.

Swap the lemon

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

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

Fit is the average pairing score against egg, sugar, 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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