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Dessert

Boston Cream Pie

A custard-filled cake with cream between layers, baked and served cold.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 10 ingredients
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Why it works: Milk and vanilla are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 19,187 recipes. Both carry ethyl caproate, which smells fruity, apple peel. The science ↓

Boston Cream Pie

Oven, in the book's wordsA rather quick oven

Ingredients

Directions

The book says “a rather quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.

Make the custard

  1. Bring 1 pint of milk to a boil.

  2. Beat 2 eggs.

  3. Add 1 cup sugar and ½ cup flour; mix well.

  4. Stir the egg mixture into the boiling milk.

  5. Add 1 ounce butter.

  6. Continue stirring until the mixture thickens.

  7. Flavor with vanilla or lemon.

Make the cake

  1. Combine 3 beaten eggs, 1½ cups flour, 1 teaspoon baking powder, and 2 tablespoons milk or water.

  2. Divide the batter in half.

  3. Pour into two medium pie tins.

  4. Bake in a 400°F (200°C) oven until golden brown.

Assemble and serve

  1. Once cooled, split each cake in half.

  2. Spread half of the cream between the layers.

  3. Serve cold.

  4. Flavor the cake part the same as the custard.

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 + vanillatop 5% of all pairs
    Smell alikemoderate
    Cooked together19,187 recipes

    Shared aroma: ethyl caproate (fruity, apple peel).

  2. Milk + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  3. Sugar + vanillatop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

    Shared aroma: beta-damascenone (apple, rose).

  4. Flour + buttertop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  5. Flour + vanillatop 12% of all pairs
    Smell alikemoderate
    Cooked together19,241 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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
Set and bind the custard and give the cake its structure as they cook.
All-purpose flour
Thickens the custard as its starch swells and gives the cake its structure.
Granulated sugar
Adds sweetness and helps keep the cake tender and moist.
Butter
Adds fat for richness and smoothness in the custard.
Baking powder
Releases gas in the batter so the cake rises and becomes light.
Milk
Forms the liquid base of the custard and adds moisture to the cake batter.

The step that matters

Keep stirring the custard until it thickens. Flour starch thickens only as the mixture heats, and constant stirring keeps the eggs and starch evenly blended so the custard stays smooth instead of lumpy or scorched on the bottom of the pan.

Swap the vanilla

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

  1. Vanillathe original
  2. Raisinfits about as well
  3. Figfits less well
  4. Coconutfits less well

Fit is the average pairing score against milk, egg, sugar, flour, 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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