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Dessert

Lemon Pie

A baked pie with lemon custard filling topped with meringue.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 10 ingredients
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Why it works: Butter and flour 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

The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.

Make the filling

  1. Preheat the oven to 350°F (175°C).

  2. Beat the yolks of the eggs with flour and sugar in a bowl.

  3. Gradually add the boiling water, lemon juice, and lemon rind.

  4. Cook the mixture in a double boiler until thickened.

Make the meringue and bake

  1. Pour the filling into the baked crust.

  2. Beat the egg whites until stiff for the meringue. Gradually add powdered sugar while continuing to beat. Add lemon juice and mix well.

  3. Spread the meringue over the pie filling.

  4. Brown the meringue slightly 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. Butter + flourtop 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. Egg + flourtop 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. Lemon + flourtop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Butter and flour 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
Egg yolks thicken the filling, and whipped egg whites form the meringue topping.
Sugar
Sweetens the filling and helps stabilize the whipped egg white meringue.
Flour
Thickens the lemon filling as it cooks.
Lemon juice
Adds acidity that gives the filling its tart flavor.
Butter
Adds richness and fat to the filling.

The step that matters

Cook the filling until thickened. The starch from the flour must be fully cooked in the hot mixture to thicken the filling properly. Undercooked starch leaves the filling thin and runny, so it may not hold its shape when cut.

Swap the lemon

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

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

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