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Dessert

Lemon Pie

A lemon custard pie topped with beaten egg whites baked until browned.

From an old cookbook · modernised transcription
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Why it works: Flour and sugar are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 92,116 recipes. Both carry phenylacetaldehyde, which smells hawthorne, honey. 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.

Prepare the filling

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

  2. In a bowl, mix the grated lemon, flour, sugar, cold water, and egg yolks until well combined.

Bake and top

  1. Pour the mixture into a pie crust and bake until set.

  2. Beat the egg whites to a froth and sweeten to taste.

  3. Spread the beaten egg whites over the baked pie and return to the oven to 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 + sugartop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  2. Flour + eggtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Lemon + flourtop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  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).

Flour and egg barely smell alike, yet cooks put them together in 106,462 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
Yolks thicken the filling and whites form the browned meringue topping.
Flour
Starch thickens the lemon filling so it sets and holds a cut slice.
Sugar
Sweetens the filling and helps the meringue topping stay glossy and brown.
Lemon
Provides the acidity and aroma that give the filling its tart flavor.

The step that matters

Spread the beaten egg whites over the baked pie and return to the oven to brown. Whites must be beaten to a stable froth and spread so they touch the crust edge; unevenly spread or underbeaten whites can weep or brown unevenly.

Swap the lemon

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

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

Fit is the average pairing score against flour, sugar, 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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