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Dessert

Boiled Sponge Cake

A light sponge cake made by beating yolks, adding sugar, water, lemon, and folding in beaten egg whites and sifted flour.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 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 ↓

Boiled Sponge 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. Beat the yolks of the eggs until light lemon colored.

  2. Gradually add ½ cup sugar while continuing to beat.

  3. Add ⅜ cup hot water and the remaining ½ cup sugar.

  4. Mix in ¼ teaspoon lemon extract.

  5. In a separate bowl, beat the egg whites until stiff.

  6. Combine the flour with 1½ teaspoons baking powder and ¼ teaspoon salt, then sift.

  7. Gently fold the egg whites and flour mixture into the yolk mixture.

Bake

  1. Pour into a buttered and floured shallow pan.

  2. Bake for 25 minutes in a 350°F (175°C) oven.

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. Lemon + flourtop 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
Yolks and whites provide structure and lift, forming the cake's airy crumb.
Sugar
Sweetens the cake and helps stabilise the beaten yolks and whites.
Baking powder
Releases gas in the oven, helping the cake rise and become light.
Flour
Forms the cake's structure once heated, holding the foam together.

The step that matters

Folding the egg whites into the yolk mixture. Stiff whites hold the cake's air. Stirring vigorously or overmixing deflates the foam, so the cake bakes up dense instead of light.

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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