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Dessert

Boston Layer Cake

A layered cake made with butter, sugar, eggs, milk, flour, baking powder, and vanilla, topped with a boiled sugar icing.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 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 Layer Cake

Oven, in the book's wordsA moderate oven

Ingredients

Directions

The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.

Make the batter

  1. Cream the butter and sugar together.

  2. Add the slightly beaten yolks of the eggs and the milk.

  3. Mix and sift the flour with the baking powder, then add to the mixture.

  4. Fold in the stiffly beaten egg whites and the vanilla.

Bake and ice

  1. Bake in layers at 350°F (175°C) until golden.

  2. For icing, boil sugar and water until it reaches a stringy consistency.

  3. Add the beaten egg whites to the syrup and mix well.

  4. Spread the icing on the cooled cake.

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

Eggs
Whites trapped by beating give the cake lift, and yolks add richness and tender crumb.
Butter
Creamed with sugar, it adds fat that gives the cake a tender texture.
Baking powder
Releases gas in the batter, helping the layers rise.
All-purpose flour
Its proteins set during baking, forming the cake's structure.
Granulated sugar
Sweetens the cake and helps it brown as it bakes.

The step that matters

Folding in the stiffly beaten egg whites. Egg whites are the main source of lift in this batter. Folding gently keeps the air bubbles intact, while stirring vigorously would deflate them and leave the layers dense.

Swap the vanilla

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

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

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