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Dessert

Lemon Pie

A lemon pie with a butter and sugar custard filling topped with beaten egg whites.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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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 Pie

Ingredients

Directions

Make the filling

  1. In a saucepan, combine boiling water and butter.

  2. In a bowl, beat the egg yolks and add sugar and cornstarch dissolved in a little water.

  3. Pour the egg mixture into the saucepan and stir until thickened.

  4. Remove from heat and add lemon juice.

Assemble and finish

  1. Pour the filling into the baked pie crust.

  2. Frost the pie with beaten egg whites.

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. Butter + eggtop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

  3. Butter + sugartop 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 filling as they set with heat and add richness.
Cornstarch
Thickens the filling by swelling in hot liquid as it cooks.
Sugar
Sweetens the filling and balances the sharpness of the lemon.
Lemon juice
Adds the tart, acidic flavor that defines the pie.
Butter
Adds fat for smoothness and a rich mouthfeel to the filling.

The step that matters

Stir the egg mixture until thickened. Egg yolks can curdle or scramble if they get too hot too fast. Stirring while the mixture heats keeps it smooth, and cornstarch helps it thicken without overcooking the eggs.

Swap the lemon

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

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

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