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Dessert

Boston Cream Cake

A baked cake made from a flour, butter, and egg batter, filled with a cornstarch‑sugar custard.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Butter and cream are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 41,516 recipes. Both carry delta-dodecalactone, which smells sweet, creamy. The science ↓

Boston Cream Cake

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 dough

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

  2. Stir in the flour while boiling and let it cook for a moment.

  3. Once cool, add the yolks of the eggs.

  4. Add the beaten egg whites.

  5. Drop spoonfuls of the mixture onto buttered baking sheets, spacing them apart.

  6. Bake in a preheated oven at 400°F (200°C) until puffed and golden.

Make the cream

  1. Combine cornstarch, sugar, and 1 egg in a saucepan for the cream.

  2. Cook the mixture over medium heat, stirring until thickened.

  3. Add flavoring to the thickened cream.

  4. Let the cream cool before filling the cakes.

Fill and serve

  1. When cool, cut a side of each cake to create an opening for 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 + creamtop 8% of all pairs
    Smell alikemoderate
    Cooked together41,516 recipes

    Shared aroma: delta-dodecalactone (sweet, creamy).

  2. Sugar + creamtop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

    Shared aroma: 2,3-butanedione (butter, sweet).

  3. Butter + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 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. Flour + eggtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, 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
Add structure and richness, and the whites help the dough puff as it bakes.
All-purpose flour
Gelatinizes with the boiling butter and water to form a dough that holds its shape.
Butter
Adds fat and tenderness and enriches the dough.
Cornstarch
Thickens the cream as it heats, giving it a smooth, spoonable body.

The step that matters

Cooking the cream until thickened. Cornstarch only thickens fully once the mixture reaches a boil and is stirred constantly, so stopping early leaves a thin, runny filling.

“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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