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Dessert

Floating Island

A dessert of gelatinous island topped with custard, flavored with lemon and sugar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 ingredients
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Floating Island

Why it works: Lemon and milk are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 19,053 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Floating Island

Ingredients

Directions

Make the gelatine dessert

  1. Soak the gelatine in water for 20 minutes.

  2. Heat the mixture with sugar until it boils.

  3. Let it cool slightly, then fold in the beaten egg whites and lemon juice and rind.

  4. Pour into a mold and refrigerate until set.

Make the custard

  1. For the custard, whisk the egg yolks with milk and cornstarch in a saucepan.

  2. Cook over low heat, stirring until thickened, then sweeten to taste.

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

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

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

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

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

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

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

Gelatine
Sets the liquid into a firm, sliceable mold once chilled.
Egg whites
Beaten into foam, they lighten the set dessert and give it its floating, airy texture.
Egg yolks
Thicken the milk into a custard as they cook, adding richness.
Cornstarch
Thickens the custard so it coats a spoon without becoming grainy.
Lemon juice and rind
Add acidity and aroma that balance the sweetness of the sugar.

The step that matters

Cook the custard over low heat. Egg yolks set at a low temperature and can curdle or scramble if overheated. Constant stirring and gentle heat let the cornstarch thicken the custard smoothly.

Swap the lemon

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

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

Fit is the average pairing score against 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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