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Dessert

Lemon Solid

A lemon custard made with isinglass, milk, cream, lemon zest and juice, sweetened with powdered sugar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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 ↓

Lemon Solid

Ingredients

Directions

Prepare

  1. Dissolve isinglass in a little milk.

  2. Grate the rinds of the lemons into their juice.

  3. Sweeten the cream with powdered sugar.

Combine and set

  1. Add the lemon juice to the cream while stirring continuously.

  2. When the isinglass is cold but not stiff, add it to the mixture.

  3. Stir well and strain through muslin into a mold.

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

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

  3. Milk + creamtop 18% of all pairs
    Smell alikemoderate
    Cooked together29,399 recipes

    Shared aroma: delta-dodecalactone (sweet, creamy).

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

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

  5. Milk + sugartop 18% of all pairs
    Smell alikelow
    Cooked together77,875 recipes

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

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
Sets the mixture into a firm, sliceable solid as it cools.
Cream
Adds richness and a smooth, velvety texture.
Lemons
Provide the sharp acidity and bright aroma of the dish.
Powdered loaf sugar
Sweetens the cream and balances the sourness of the lemon.

The step that matters

Adding the isinglass at the right temperature. Isinglass is a gelatin-like setting agent that begins to firm as it cools. Added when cold but not stiff, it blends evenly through the cream and lemon. If it is added too early it may set unevenly, and if it is too cold it may form lumps or set before the mixture is fully combined.

Swap the lemon

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

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

Fit is the average pairing score against milk, 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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