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Lemon Floating Island

A custard base flavored with lemon topped with beaten egg whites.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Lemon and red currant work together. They rank in the top 12% of all ingredient pairs, and cooks put them together in 309 recipes. Both carry alpha-pinene, which smells pine, turpentine. The science ↓

Lemon Floating Island

Ingredients

Directions

Prepare the custard

  1. Separate the egg whites from the yolks.

  2. Beat the yolks and mix with the milk, flavoring strongly with lemon.

  3. Stir the mixture over gentle heat until it thickens, but do not let it boil.

  4. Remove from heat and, when nearly cool, gradually add the lemon juice.

Assemble and serve

  1. Beat the egg whites to a solid froth, sweeten them, and add lemon essence.

  2. Pour the custard into a glass dish and pile the beaten egg whites on top.

  3. Garnish as desired, using red currant jelly for decoration if preferred.

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 + red curranttop 12% of all pairs
    Smell alikemoderate
    Cooked together309 recipes

    Shared aroma: alpha-pinene (pine, turpentine).

  2. Milk + lemontop 15% of all pairs
    Smell alikemoderate
    Cooked together19,053 recipes

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

  3. Milk + red curranttop 18% of all pairs
    Smell alikemoderate
    Cooked together193 recipes

    Shared aroma: isoamyl acetate (banana, pear).

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

Egg and lemon barely smell alike, yet cooks put them together in 44,316 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
Whites whip into a foam that forms the floating island, while yolks thicken the custard.
Milk
Forms the liquid base of the custard, carrying the lemon flavor and setting when gently heated.
Lemon juice
Adds acidity and bright flavor to the custard when stirred in after cooling.

The step that matters

Stirring the custard over gentle heat. Egg yolks thicken the milk only up to a point; if the mixture boils, the proteins tighten and curdle, leaving a grainy custard. Gentle, constant stirring keeps it smooth.

Swap the red currant

The recipe marks red currant as optional. How well each one fits the dish's main ingredients (egg, milk, lemon):

  1. Orangefits better
  2. Vanillafits better
  3. Raspberryfits better
  4. Red currantthe original

Fit is the average pairing score against egg, milk, lemon. 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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