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Dessert

A Lemon Cream in Shape

A chilled lemon cream set in molds using isinglass, thick cream, and lemon juice.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Cream and sugar are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 43,450 recipes. Both carry 2,3-butanedione, which smells butter, sweet. The science ↓

A Lemon Cream in Shape

Ingredients

Directions

Prepare the isinglass

  1. In a small saucepan, combine isinglass and water. Simmer over low heat until dissolved, stirring occasionally.

  2. Strain the mixture into a saucer through a sieve and let it cool.

Make the mousse

  1. Rub a lemon on lump sugar and scrape it into a deep bowl.

  2. Add lemon juice and thick cream to the bowl. Whisk quickly until it thickens and froths.

  3. Sweeten with sifted lump sugar to taste, then mix in the cooled isinglass.

  4. When it begins to set, pour into molds and refrigerate for an hour.

Serve

  1. Garnish with sliced lemon before serving.

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. Cream + sugartop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

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

  2. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

  3. Lemon + creamtop 30% of all pairs
    Smell alikelow
    Cooked together15,640 recipes

    Shared aroma: acetic acid (sour, vinegar).

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

Isinglass
Gelatin-like setting agent that firms the mousse as it chills.
Thick cream
Adds fat and richness, and whisking traps air to give a light, frothy texture.
Lemon juice
Provides acidity and bright lemon flavour that balances the sweetness.
Lump sugar
Sweetens the mousse and helps balance the sharpness of the lemon.

The step that matters

Whisk the cream while the mixture is still liquid, and pour before it sets fully. Cream whips into a foam that holds air only while it is loose; if the isinglass sets too far first, the mousse becomes lumpy and dense. Pouring once it just begins to set keeps it smooth and even.

Swap the lemon

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

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

Fit is the average pairing score against cream, 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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