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Dessert

Lemon Pie

A lemon pie with a meringue topping.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 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

Ingredients

Directions

Make the filling

  1. Beat the yolks of the eggs until light.

  2. Mix the sugar and flour together.

  3. Slowly add the boiling water to the mixture.

  4. Cook for 20 minutes, stirring frequently.

  5. Add the mixture to the beaten egg.

  6. Add butter and lemon.

  7. Cook until the egg thickens.

Assemble and bake

  1. Once cool, pour the mixture into a baked pie crust.

  2. Cover with meringue.

  3. Bake until golden brown.

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. Flour + sugartop 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. Lemon + buttertop 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

Eggs
Thicken the filling when cooked and provide richness and structure to the custard.
Flour
Thickens the sugar and water mixture so the filling sets smoothly.
Sugar
Sweetens the filling and balances the sharpness of the lemon.
Lemon
Adds acidity and aroma that brighten the filling.
Butter
Adds fat for a smoother texture and richer flavor in the filling.

The step that matters

Cook until the egg thickens. Egg proteins set when heated, but if the filling gets too hot or is cooked too fast, the eggs can scramble and turn grainy. Cook gently and stir while the custard thickens.

Swap the lemon

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

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

Fit is the average pairing score against flour, sugar, 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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