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Dessert

Lemon Sponge Cake

A light cake made with eggs, sugar, flour, lemon juice and zest, topped with a powdered sugar icing.

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

Lemon 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 cake

  1. Separate the eggs.

  2. Beat the yolks with sugar and lemon juice until thick and light.

  3. Whisk the egg whites until dry.

  4. Gently fold in the egg whites and flour, half at a time.

  5. Butter your pan well and bake in a moderate oven at 350°F (175°C) until done.

Make the icing

  1. For the icing, mix powdered sugar with cold water in a bowl.

  2. Beat the egg whites lightly and add to the sugar mixture.

  3. Place the bowl in a vessel of boiling water and heat until thin and clear.

  4. Once it thickens, remove from heat and stir until cool enough to spread.

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 lift and airy structure, while yolks add richness.
Flour
Provides the starch and gluten framework that sets the cake's crumb once baked.
Sugar
Sweetens the cake and helps the beaten yolks become thick and light.
Powdered sugar
Dissolves into the egg whites to form a sweet, spreadable icing.

The step that matters

Folding in the egg whites and flour. Whipped egg whites hold air that gives the sponge its rise. Folding gently, half at a time, keeps that air from deflating, so the cake bakes up light instead of dense.

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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