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Dessert

The Boys' Sponge Cake

A light sponge cake made with eggs, sugar, flour, baking powder, lemon extract, and salt.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Sugar and flour are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 92,116 recipes. Both carry phenylacetaldehyde, which smells hawthorne, honey. The science ↓

The Boys' Sponge Cake

Oven, in the book's wordsA good oven

Ingredients

Directions

The book says “a good oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure. The book gives no cooking times; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.

Prepare

  1. Preheat the oven to 350°F (175°C).

Make the batter

  1. Beat the sugar and egg yolks together until well combined.

  2. In a separate bowl, beat the egg whites until stiff peaks form, then gently fold them into the yolk mixture.

  3. Sift the flour and baking powder together, then gradually add to the egg mixture while stirring continuously.

  4. Add the salt and lemon extract, mixing until just combined.

Bake

  1. Pour the batter into a greased cake pan and bake for 25-30 minutes or until a toothpick comes out clean.

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. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

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

    Shared aroma: isobutyraldehyde (malty, green).

  3. Flour + lemontop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

  5. Egg + lemontop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

Egg and flour barely smell alike, yet cooks put them together in 106,462 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
Whipped whites give the sponge its light, airy structure, while yolks add richness and set during baking.
Sugar
Sweetens the cake and helps stabilise the whipped egg structure.
All-purpose flour
Provides the starch that sets the crumb once the cake bakes.
Baking powder
Releases gas during baking so the batter rises and becomes lighter.

The step that matters

Folding in the egg whites. Whites hold air only while whipped; overmixing or stirring them in deflates the foam, leaving a dense cake. Fold gently in large strokes so the batter keeps its rise.

Swap the lemon

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

  1. Raisinfits better
  2. Vanillafits better
  3. Lemonthe original
  4. Figfits about as well

Fit is the average pairing score against egg, sugar, 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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