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Dessert

Boiled Sponge Cake

A sponge cake made by boiling sugar syrup and folding into beaten eggs and flour.

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 ↓

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 syrup

  1. Combine the sugar and boiling water in a clean saucepan.

  2. Stir over heat until the sugar dissolves.

  3. Boil slowly without stirring until the syrup forms a fine thread when poured from a spoon.

Make the batter

  1. Pour the syrup slowly over the beaten egg yolks.

  2. Beat until the mixture cools and is light and fluffy.

  3. Whip the egg whites to a stiff froth.

  4. Gently fold in half of the whipped egg whites into the yolk mixture.

  5. Carefully stir in the sifted flour.

  6. Fold in the remaining egg whites.

Bake

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

  2. Pour the batter into a shallow pan lined with paper.

  3. Bake for about 30 minutes, or until set.

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 and beaten yolks trap air and set the cake's light, airy structure.
Sugar
Sweetens the cake and, cooked into syrup, helps give the sponge its tender texture.
Pastry flour
Provides the light starch structure that holds the sponge once baked.

The step that matters

Folding in the egg whites. Whites hold the air that makes the sponge rise. Stirring them in vigorously or folding too long deflates the foam, leaving a dense cake.

Swap the lemon

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

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

Fit is the average pairing score against sugar, egg, 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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