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Dessert

Lemon Pie

A lemon pie with a crust, sugar, flour, boiling water, butter, lemon juice, egg yolk, egg white, and powdered sugar topping.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Flour and butter 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

Oven, in the book's wordsA hot oven

Ingredients

Directions

The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.

Prepare

  1. Preheat the oven to 400°F (200°C).

  2. Prepare a baked pie crust.

Make the filling

  1. In a bowl, stir together sugar and flour.

  2. Pour boiling water over the mixture and boil for 10 minutes.

  3. Add butter, lemon juice, and egg yolk, then boil for an additional moment.

Top and bake

  1. Beat the egg white until stiff, then mix in a little powdered sugar.

  2. Spread the egg white mixture lightly over the pie.

  3. Brown the pie in the oven.

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. Flour + buttertop 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. Flour + eggtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Butter + lemontop 16% of all pairs
    Smell alikemoderate
    Cooked together41,227 recipes

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

  5. Flour + lemontop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Flour and butter 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

Sugar
Sweetens the filling and helps thicken it when boiled with the flour.
Flour
Thickens the filling so it sets rather than staying runny.
Lemon juice
Adds the sharp acidity that gives the filling its lemon flavour.
Egg yolk
Enriches and thickens the filling, adding richness and body.
Egg white
Whipped to stiff peaks, it forms the light topping that browns in the oven.

The step that matters

Boiling the filling after adding the egg yolk. Egg yolk thickens only when heated, but it can scramble if boiled too hard or too long. Keep the heat controlled and stir constantly so the filling thickens smoothly.

Swap the lemon

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

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

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