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Dessert

Lemon Custard Pie

A pie filled with lemon custard topped with meringue.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 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 Custard 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. Dissolve the cornstarch in the water.

  2. In a bowl, combine the grated lemon, egg yolks, sugar, and melted butter.

  3. Add the dissolved cornstarch to the mixture and stir well.

  4. Pour the filling into a pie crust.

  5. Bake at 350°F (175°C) until set.

Top with meringue

  1. Whip the egg whites until soft peaks form.

  2. Gradually add sugar and continue whipping until stiff peaks form.

  3. Spread the meringue over the pie.

  4. Brown the meringue 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. Lemon + buttertop 16% of all pairs
    Smell alikemoderate
    Cooked together41,227 recipes

    Shared aroma: 3-hexenal (apple, fruity).

  2. Egg + buttertop 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

Egg yolks
Thicken the filling and add richness and color to the custard.
Egg whites
Whipped into foam to form the airy, stable meringue topping.
Cornstarch
Thickens the liquid filling so it sets into a sliceable custard.
Sugar
Sweetens the custard and helps stabilize the whipped egg whites.
Butter
Adds fat for a smoother, richer texture in the filling.

The step that matters

Bake the filling until set. Cornstarch thickens only when heated, and egg yolks set as they warm. Underbaking leaves a runny custard, while overbaking can make it weep or turn grainy.

Swap the lemon

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

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

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