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Dessert

Rhubarb Mould

A chilled dessert made from rhubarb, sugar, gelatin, lemon rind, and cochineal.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Rhubarb and lemon match in chemistry and in kitchens. They rank in the top 7% of all ingredient pairs, and cooks put them together in 546 recipes. Both carry acetic acid, which smells sour, vinegar. The science ↓

Rhubarb Mould

Ingredients

Directions

Make the mould

  1. Place rhubarb, sugar, and water in a covered dish in the oven.

  2. Soak gelatine in a small quantity of water.

  3. Once the juice is extracted from the rhubarb, strain it and add the gelatine, lemon rind, and cochineal.

Serve

  1. When set, serve with whipped cream or custard.

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. Rhubarb + lemontop 7% of all pairs
    Smell alikestrong
    Cooked together546 recipes

    Shared aroma: acetic acid (sour, vinegar).

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

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

  3. Rhubarb + sugartop 18% of all pairs
    Smell alikemoderate
    Cooked together1,852 recipes

    Shared aroma: 1-penten-3-one (fish, pungent).

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

Rhubarb
Provides the tart flavour and the juice that the mould is made from.
Gelatine
Sets the strained juice into a firm mould that holds its shape.
Sugar
Sweetens the tart rhubarb and balances its acidity.
Lemon rind
Adds a bright citrus aroma to the juice.

The step that matters

Dissolving the gelatine into the strained juice. The soaked gelatine must dissolve fully into the warm juice before it sets. Undissolved granules leave grainy patches, and gelatine that does not blend evenly can set unevenly.

Swap the rhubarb

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

  1. Cinnamonfits better
  2. Gingerfits better
  3. Marjoramfits better
  4. Rhubarbthe original

Fit is the average pairing score against lemon, 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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