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Dessert

Boston Cream Pie

A layered pie with a thickened milk mixture and a baked batter, finished with a cream filling.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Milk and flour are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 78,219 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Boston Cream Pie

Oven, in the book's wordsA quick oven

Ingredients

Directions

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

Make the custard

  1. In a saucepan, heat ⅔ of the milk until boiling.

  2. In a separate bowl, mix the remaining milk with the sugar and flour.

  3. Once the milk boils, add the milk mixture and stir until thickened.

  4. Let it cool, then flavor with vanilla or lemon.

Make the cake

  1. In a bowl, beat the eggs separately.

  2. Combine the beaten eggs with 1 cup of sugar, 1.5 cups of flour, and 1 teaspoon of baking powder.

  3. Divide the batter into two pie tins.

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

Assemble

  1. Once baked, split the cakes in half and spread the cream filling between them.

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 + flourtop 14% of all pairs
    Smell alikelow
    Cooked together78,219 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Flour + sugartop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  3. Egg + flourtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

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

  5. Milk + sugartop 18% of all pairs
    Smell alikelow
    Cooked together77,875 recipes

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

Milk and flour barely smell alike, yet cooks put them together in 78,219 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
Add structure and richness to the cake batter as they set when baked.
Flour
Provides the structure of the cake and thickens the custard as its starch cooks.
Milk
Forms the liquid base of the custard, which thickens as it heats.
Sugar
Adds sweetness to both the cake and the custard filling.
Baking powder
Releases gas in the batter so the cakes rise and turn light.

The step that matters

Stir the custard until thickened. Flour starch thickens the milk only when it is heated and stirred steadily, which prevents lumps and scorching on the base of the pan.

“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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