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Dessert

Caramel Sponge Cake

A light sponge cake flavored with lemon and topped with caramel frosting and chocolate.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 11 ingredients
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Why it works: Sugar and chocolate are a kitchen classic. They rank in the top 13% of all ingredient pairs, and cooks put them together in 15,404 recipes. Both carry guaiacol, which smells smoky, sweet. The science ↓

Caramel Sponge Cake

Ingredients

Directions

The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point. The book gives no cooking times either; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.

Make the cake

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

  2. In a bowl, combine the beaten eggs, sugar, and salt.

  3. Gradually add 1 cup of flour, mixing well.

  4. In a separate bowl, mix the remaining ½ cup flour with baking powder and lemon extract.

  5. Stir this mixture into the egg mixture, then add boiling water and mix until smooth.

  6. Pour the batter into a greased cake pan and bake for 25-30 minutes.

Make the frosting

  1. For the frosting, boil 1 cup of sugar with 3 tablespoons of water until it forms threads.

  2. Beat the egg white until stiff, then stir it into the hot frosting.

Finish and serve

  1. Spread the frosting over the cooled cake.

  2. Melt the chocolate and spread it on top of the frosting.

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 + chocolatetop 13% of all pairs
    Smell alikemoderate
    Cooked together15,404 recipes

    Shared aroma: guaiacol (smoky, sweet).

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

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

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

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: isobutyraldehyde (malty, green).

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

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

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
Beaten eggs give the sponge its structure and lift as they trap air.
Flour
Provides the structure that holds the sponge's airy crumb once baked.
Baking powder
Releases gas in the batter so the cake rises and becomes light.
Sugar
Sweetens the cake and helps keep it tender and moist.
Egg white
Beaten until stiff, it gives the frosting a light, fluffy texture.

The step that matters

Boiling the frosting sugar to threads. Sugar syrup must reach the right concentration to set properly; too little cooking leaves the frosting runny, while overcooking makes it hard and grainy. Stirring the beaten egg white into the hot syrup needs quick work so it stays airy.

Swap the lemon

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

  1. Vanillafits better
  2. Raisinfits better
  3. Datesfits better
  4. Lemonthe original

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