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Dessert

Lemon Pie

A lemon pie with a buttery crust and meringue topping.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 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 the oven to 350°F (175°C).

  2. Mix the sugar and butter together until creamy.

  3. Add the beaten egg and mix well.

  4. Combine the flour with a little cold water to form a paste.

  5. Pour in boiling water until the mixture is like paste.

  6. Once cooled, add the lemon juice to the sugar and egg mixture.

Bake and top

  1. Pour the filling into a pie crust and bake with the lower crust only.

  2. After baking, spread the beaten egg whites mixed with ½ cup sugar on top.

  3. Return to the oven until the meringue is slightly 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
Binds the filling and adds richness, and its whites set into the meringue topping.
Flour
Thickens the filling into a paste-like texture once cooked.
Butter
Adds fat and richness, giving the filling a smooth, creamy body.
Sugar
Sweetens the filling and helps the meringue become glossy and browned.
Lemon
Provides the sharp acidity and citrus aroma that define the filling.

The step that matters

Add the lemon juice after the mixture cools. Adding acidic lemon juice to a hot, starch-thickened mixture can cause it to thin or weep. Letting it cool first helps the filling stay set and smooth.

Swap the lemon

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

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

Fit is the average pairing score against sugar, egg, 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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