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Dessert

Lemon Custard Pie

A pie filled with a lemon custard made from lemon rind, juice, sugar, milk, egg yolks, and corn starch.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Milk and corn are a kitchen classic. They rank in the top 10% of all ingredient pairs, and cooks put them together in 6,955 recipes. Both carry hexanal, which smells green, grassy. 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. The book gives no cooking times either; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.

Prepare the filling

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

  2. In a bowl, mix the lemon rind, lemon juice, sugar, milk, egg yolks, and corn starch until smooth.

  3. Pour the mixture into the pie crust.

Bake and finish

  1. Bake until set, about 30 minutes.

  2. Whip the egg whites until stiff peaks form and frost the pie.

  3. Brown the frosting slightly under the broiler.

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. Milk + corntop 10% of all pairs
    Smell alikemoderate
    Cooked together6,955 recipes

    Shared aroma: hexanal (green, grassy).

  2. Lemon + corntop 13% of all pairs
    Smell alikemoderate
    Cooked together1,927 recipes

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

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

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

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

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

  5. Milk + eggtop 18% of all pairs
    Smell alikemoderate
    Cooked together88,785 recipes

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

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 custard and add richness as they set during baking.
Corn starch
Thickens the liquid filling so it sets into a sliceable custard.
Sugar
Sweetens the filling and balances the tartness of the lemon.
Lemon
Provides the acidity and bright lemon aroma from the rind and juice.
Milk
Supplies the liquid base that the starch and yolks set into custard.
Egg whites
Whipped to stiff peaks to form a meringue topping that browns under the broiler.

The step that matters

Bake until set. Underbaked custard stays runny because the egg yolks and starch have not fully thickened. Egg proteins set with heat, so check that the filling is firm at the centre before removing it from the oven.

Swap the lemon

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

  1. Vanillafits better
  2. Coconutfits better
  3. Figfits better
  4. Lemonthe original

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