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Dessert

Sponge Cake

A lemon sponge cake made by steeping lemon peel, dissolving sugar, whisking eggs, and baking at 350°F.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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 ↓

Sponge Cake

Oven, in the book's wordsA moderately hot oven

Ingredients

Directions

The book says “a moderately hot oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.

Prepare the syrup

  1. Pare the lemon thin and place the peel in a ½ cup of water.

  2. Let it stand for several hours.

  3. Heat the sugar in a saucepan with the lemon water and peel until hot.

Make the batter

  1. Break the eggs into a deep, warmed bowl and whisk them with a hot whisk for a few minutes.

  2. Bring the sugar and water mixture to a boil, then pour it boiling hot over the whisked eggs while continuing to whisk briskly for 15 minutes.

  3. Gently stir in the warm, dried flour.

Bake

  1. Pour the batter into tins lined with white paper and bake immediately in a moderate oven at 350°F (175°C).

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. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

  5. Lemon + eggtop 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
Whisked with hot sugar syrup, they trap air and form the sponge's structure.
Flour
Sets the cake's structure once the batter is baked.
Sugar
Sweetens the cake and helps stabilise the whisked egg foam.
Lemon
Its peel, steeped in water, flavours the syrup and gives the cake its aroma.

The step that matters

Whisking in the boiling syrup. Pouring the syrup boiling hot while whisking briskly cooks the eggs slightly and builds a stable foam. Stirring in the flour gently keeps that air from collapsing.

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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