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Dessert

Lemon Sponge

A lemon gelatin dessert made with gelatine, lemon rind, juice, egg white, and sugar or saccharine.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Lemon and sugar are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Lemon Sponge

Ingredients

Directions

Prepare the jelly

  1. Soak the gelatine in cold water until soft, then strain off the water.

  2. In a clean, dry saucepan, combine the gelatine, 2 cups of water, sugar or saccharine, the thinly‑cut rind of the lemon, and its strained juice.

  3. Add the beaten egg white and the washed eggshell.

  4. Whisk over medium heat until the mixture boils, then let it simmer for a few minutes.

  5. Strain the mixture through a cloth into a basin.

Whisk and set

  1. As the jelly cools, whisk it until it becomes creamy and almost stiff.

  2. Pour into a mold or pile in a glass dish, and serve when fully 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. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

  2. Lemon + eggtop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

  3. Egg + sugartop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

Lemon and sugar barely smell alike, yet cooks put them together in 53,532 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

Gelatine
Sets the liquid into a firm, wobbly structure as it cools.
Egg white
Whipped into the cooled jelly to lighten its texture into a creamy, airy sponge.
Lemon
Adds the sharp, aromatic flavour of its rind and juice.
Loaf sugar or saccharine
Provides sweetness to balance the lemon's acidity.

The step that matters

Whisking the jelly as it cools. Whisking while the mixture is cooling but still liquid traps air and forms a stable foam. If it is whisked after it has firmed, it will not become light and creamy.

Swap the lemon

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

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

Fit is the average pairing score against egg, sugar. 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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