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Lemon Sponge

A lemon-flavored gelatin sponge made with egg whites, sugar, lemon juice and zest, served with cream.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Gelatin and cream match in chemistry and in kitchens. They rank in the top 7% of all ingredient pairs, and cooks put them together in 1,628 recipes. Both carry acetic acid, which smells sour, vinegar. The science ↓

Lemon Sponge

Ingredients

Directions

Make the sponge

  1. Beat the egg whites until very stiff.

  2. Gradually add the sugar while continuing to beat.

  3. Add the juice and zest of the lemon.

  4. Dissolve the gelatin in the cold water by stirring over low heat.

  5. Let the gelatin cool until lukewarm, then add it to the beaten egg mixture.

  6. Beat the mixture hard until it begins to thicken.

Set and serve

  1. Pour the mixture into a mold and refrigerate until set.

  2. Serve with cream.

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. Gelatin + creamtop 7% of all pairs
    Smell alikestrong
    Cooked together1,628 recipes

    Shared aroma: acetic acid (sour, vinegar).

  2. Sugar + gelatintop 7% of all pairs
    Smell alikemoderate
    Cooked together2,778 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  3. Sugar + creamtop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

    Shared aroma: 2,3-butanedione (butter, sweet).

  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).

Sugar and lemon 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

Egg whites
Whipped into a foam that gives the sponge its light, airy structure.
Sugar
Sweetens the sponge and helps stabilise the whipped egg white foam.
Knox gelatin
Sets the mixture into a firm, sliceable sponge as it chills.
Lemon
Adds acidity and bright lemon aroma from its juice and zest.

The step that matters

Beat the mixture hard until it begins to thicken. Gelatin must be lukewarm, not hot or set, when added; if it is too hot it can deflate the whipped foam, and if too cold it forms lumps and clumps. Beating while it thickens traps air so the sponge stays light.

Swap the lemon

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

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

Fit is the average pairing score against egg, sugar, gelatin, cream. 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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