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Dessert

Lemon Pie

A lemon custard filling poured into a baked crust.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Lemon and butter 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

Prepare the filling

  1. Juice the lemons and grate the rind.

  2. In a saucepan, bring 2 cups of water to a boil.

  3. Wet the cornstarch with cold water and stir it into the boiling water.

  4. Add the sugar, melted butter, and beaten egg yolk to the boiling mixture.

  5. Stir well and let it cool.

Assemble

  1. Bake your pie crust, then pour the lemon mixture into it.

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. Lemon + buttertop 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. Sugar + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

  4. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

  5. Lemon + eggtop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

Lemon and sugar 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

Cornstarch
Thickens the boiling water into a set, spoonable filling as it gelatinizes.
Egg
Adds richness and helps the filling set as it cools.
Sugar
Sweetens the filling and balances the sharpness of the lemon juice.
Lemons
Provide the acidity and fragrance of the filling, from juice and rind.
Melted butter
Adds fat for a smoother, richer texture in the filling.

The step that matters

Wet the cornstarch with cold water before stirring it into the boiling water. Cornstarch added dry to hot liquid clumps instantly, and a smooth thickening depends on it being fully dispersed first.

Swap the lemon

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

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

Fit is the average pairing score against 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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