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Dessert

Floating Island

A dessert of meringue floating on custard made with gelatin, sugar, eggs, lemon, milk, and cornstarch.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Floating Island

Why it works: Gelatin and sugar are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 2,778 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓

Floating Island

Ingredients

Directions

Make the lemon gelatin

  1. Soak gelatin in water for 20 minutes.

  2. Heat the mixture with sugar until it boils.

  3. Let it cool slightly.

  4. Fold in beaten egg whites and lemon juice and rind.

  5. Pour into a mold and refrigerate until set.

Make the custard

  1. Whisk egg yolks with milk and cornstarch.

  2. Sweeten to taste.

  3. Cook until thickened.

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.

Photo for illustrative purposes only · Contact us to use it

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 + sugartop 7% of all pairs
    Smell alikemoderate
    Cooked together2,778 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  2. Lemon + milktop 15% of all pairs
    Smell alikemoderate
    Cooked together19,053 recipes

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

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

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

  4. Egg + milktop 18% of all pairs
    Smell alikemoderate
    Cooked together88,785 recipes

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

  5. Sugar + milktop 18% of all pairs
    Smell alikelow
    Cooked together77,875 recipes

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

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

Gelatin
Sets the water mixture into a firm, sliceable base once chilled.
Egg whites
Beaten and folded in to add airy lightness to the set dessert.
Egg yolks
Thicken the milk custard as they cook and add richness.
Cornstarch
Thickens the custard so it holds its body when cooked.
Sugar
Sweetens the lemon mixture and, with heat, helps it dissolve evenly.

The step that matters

Cook until thickened. Egg yolks can curdle if overheated, so the custard should be cooked gently and stirred until it just coats a spoon. Cornstarch thickens as it heats, so the custard needs to reach a simmer to reach full thickness.

Swap the lemon

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

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

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