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Dessert

Boston Cream Cake

A cake baked from boiled water, butter, flour, eggs, soda, and milk, filled with a lemon‑rind flavored cream.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 ingredients
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Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

Boston Cream Cake

Oven, in the book's wordsA quick oven

Ingredients

Directions

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

Make the choux paste

  1. Boil the water and butter together.

  2. Stir in the flour while boiling.

  3. When cool, add the eggs and soda.

  4. Drop spoonfuls onto a buttered baking pan, leaving space between the spoonfuls.

  5. Bake in a very hot oven (400°F / 200°C) for about 10 minutes.

Make the cream

  1. Beat together the flour, sugar, and eggs.

  2. Stir the mixture into boiling milk.

  3. Flavor the cream with the lemon rind.

Fill and serve

  1. Make an incision at the side of each cake.

  2. Fill the incision 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. Butter + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

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

  2. Butter + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Flour + milktop 14% of all pairs
    Smell alikelow
    Cooked together78,219 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  5. Milk + lemontop 15% of all pairs
    Smell alikemoderate
    Cooked together19,053 recipes

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

Butter and flour barely smell alike, yet cooks put them together in 124,287 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
Bind the paste and add structure and richness to the cakes and the cream.
Butter
Adds fat and richness, and softens the texture of the baked cakes.
Flour
Provides structure to the paste and thickens the cream.
Milk
Forms the liquid base of the cream, giving it body and a milky flavor.
Sugar
Adds sweetness and helps the cream set smooth and thick.

The step that matters

Bake in a very hot oven. A very hot oven makes the moisture in the paste turn to steam quickly, which puffs the cakes and leaves a hollow center for the cream. Opening the oven early can cause them to collapse.

Swap the lemon

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

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

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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