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Dessert

Lemon Pie

A pie with a lemon-flavored filling made from flour, sugar, boiling water, lemon juice and rind, and eggs.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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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 crust

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

  2. Line a pie plate with the pie crust and bake until golden.

Make the filling

  1. In a bowl, mix the flour with a little water and the sugar.

  2. Add the boiling water and cook until thick.

  3. Stir in the lemon juice, lemon rind, whole egg, and egg yolks.

Assemble and bake

  1. Pour the filling into the baked pie shell.

  2. Bake in the oven for a few minutes, then cover with meringue.

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. Flour + lemontop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Sugar + lemontop 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

Flour
Thickens the filling as it cooks with the boiling water.
Sugar
Sweetens the filling and balances the sharpness of the lemon.
Lemon juice
Adds acidity and bright lemon flavour to the filling.
Egg yolks
Enrich the filling and help it set to a creamy texture.
Whole egg
Adds structure and helps the filling set when cooked.

The step that matters

Cook the filling until thick. Flour starch must be cooked with the boiling water until it swells and thickens. If the filling is not cooked long enough, it stays runny and will not set properly when cooled.

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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