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Dessert

Rhubarb Conserve

A preserve made from rhubarb, sugar, citrus, and walnuts.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Orange and lemon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 10,634 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓

Rhubarb Conserve

Ingredients

Directions

Prepare

  1. Prepare the oranges by slicing the peel very thin and breaking up the pulp.

  2. If using a whole lemon, prepare it the same way.

Cook the preserve

  1. Combine all the fruit in a pot with a little water to prevent sticking.

  2. Cook until the orange and lemon peel are tender.

  3. Add the sugar and cook until the mixture thickens when tested on ice.

  4. Stir in the walnuts and pour into sterilized glasses.

Seal

  1. Once cool, cover with melted paraffin.

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. Orange + lemontop 1% of all pairs
    Smell alikestrong
    Cooked together10,634 recipes

    Shared aroma: 3-hexenal (apple, fruity).

  2. Rhubarb + orangetop 5% of all pairs
    Smell alikemoderate
    Cooked together299 recipes

    Shared aroma: 2-methoxy-4-vinylphenol (clove, smoky).

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

    Shared aroma: acetic acid (sour, vinegar).

  4. Rhubarb + walnuttop 8% of all pairs
    Smell alikestrong
    Cooked together73 recipes

    Shared aroma: coumarin (sweet, hay).

  5. Walnut + lemontop 10% of all pairs
    Smell alikestrong
    Cooked together2,149 recipes

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

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Rhubarb
Provides the bulk of the fruit and its tart flavour, which the sugar balances.
Sugar
Sweetens the preserve and, as it cooks down, thickens it to a spreadable set.
Oranges
Adds aromatic oil and pectin-rich peel that helps the preserve set.
Walnuts
Add crunch and a toasty, nutty flavour against the soft fruit.

The step that matters

Testing for thickness on ice. Sugar concentrates as the mixture cooks, and the preserve sets only at the right sugar and pectin balance. Testing a cold spoonful on ice shows whether it has thickened enough, since undercooking leaves it runny and overcooking makes it stiff.

Swap the walnut

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

  1. Almondfits better
  2. Pistachiofits better
  3. Chestnutfits better
  4. Walnutthe original

Fit is the average pairing score against rhubarb, sugar, orange, 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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