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Dessert

Lemon Pie

A baked lemon custard pie with pastry crust.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Lemon and milk are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 19,053 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Lemon Pie

Ingredients

Directions

The book gives no oven temperature. The 300°F (150°C) in the steps was added when the recipe was transcribed, as a starting point.

Make the filling

  1. Mix cornstarch with a little milk.

  2. Heat the remaining milk until boiling.

  3. Add the cornstarch mixture and boil for 1 minute.

  4. Let it cool.

  5. Add the egg yolks, 4 tablespoons of sugar, and the lemon juice and rind. Beat well.

Assemble and bake

  1. Line a deep pie plate with pastry.

  2. Fill it with the lemon mixture.

  3. Bake at 300°F (150°C) for 30 minutes.

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 + milktop 15% of all pairs
    Smell alikemoderate
    Cooked together19,053 recipes

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

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

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

  3. Egg + milktop 18% of all pairs
    Smell alikemoderate
    Cooked together88,785 recipes

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

  4. Sugar + milktop 18% of all pairs
    Smell alikelow
    Cooked together77,875 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

Eggs
Egg yolks thicken the custard as they set, giving the filling body.
Cornstarch
Starch thickens the milk as it boils, giving the filling a smooth, sliceable structure.
Milk
Forms the liquid base of the custard that the starch and yolks thicken.
Sugar
Adds sweetness that balances the sharpness of the lemon.
Lemon
Juice supplies the sharp acidity and rind adds aromatic citrus oil.

The step that matters

Boil the cornstarch mixture for 1 minute. Starch only thickens fully once it reaches a boil, so the filling must be brought to a full boil to set properly later. Adding the yolks after cooling avoids scrambling them with hot starch.

Swap the lemon

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

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

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