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Dessert

Lemon Pie

A lemon custard pie with meringue topping baked in a double crust.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 10 ingredients
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Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 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.

Prepare the filling

  1. Preheat oven to 350°F (175°C).

  2. Beat the yolks of 3 eggs.

  3. Add 1 cup sugar, 1 cup water, 1 tablespoon cornstarch dissolved in water, and juice of 1 lemon; mix well.

  4. Line two pans with pie crusts and pour mixture into the pans.

Top and bake

  1. Beat the whites of 3 eggs to a froth, adding 3 tablespoons sugar.

  2. Spread egg white mixture on top of the pie filling.

  3. Bake until the top is 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 + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  3. Egg + flourtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

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

  5. Lemon + flourtop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Butter and flour barely smell alike, yet cooks put them together in 124,287 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 with the sugar and lemon.
Cornstarch
Thickens the lemon filling so it holds its shape when cut.
Egg whites
Beaten into a foam to form a light topping that browns in the oven.
Sugar
Sweetens the filling and helps stabilize the beaten egg white topping.
Lemon juice
Adds the sharp acidity that balances the sweetness of the filling.

The step that matters

Beating the egg whites to a froth. Whites must be beaten until foamy and stable so the topping holds air and bakes light rather than collapsing or weeping. Sugar added during beating strengthens the foam.

Swap the lemon

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

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

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