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Dessert

Boston Cream Cakes

A layered cake with a butter and flour batter, baked, filled with a custard made from milk, eggs, sugar, and flour, flavored with vanilla.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 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 Cakes

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 choux pastry

  1. Boil the butter and water together in a saucepan.

  2. Sprinkle in the flour while boiling and stir continuously for 2–3 minutes.

  3. Let the mixture cool.

  4. Add the eggs and baking soda; beat well.

  5. Drop tablespoonfuls of the batter onto baking sheets.

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

Make the filling

  1. Boil the milk for the filling.

  2. Beat together the eggs, sugar, and flour in a bowl.

  3. Stir the mixture into the boiling milk.

  4. Flavor with vanilla.

  5. Let cool.

Assemble

  1. Open one side of each cake.

  2. Fill with the cream.

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. Butter + milktop 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. Butter + flourtop 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

Butter
Adds fat and richness, and helps give the pastry its tender texture.
Eggs
Provide structure and lift, setting the batter as it bakes.
Flour
Forms the structure of the pastry and thickens the filling.
Milk
Forms the liquid base of the filling, adding richness and body.
Sugar
Adds sweetness and helps the filling set smoothly.

The step that matters

Stirring the flour into the boiling butter and water. The flour must be stirred continuously while boiling so the starch cooks through and the paste holds together. Stopping early can leave a loose, poorly rising dough.

Swap the vanilla

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

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

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