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Dessert

Rhubarb Jam

A sweet preserve made from rhubarb, sugar, and lemon, cooked and jarred.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 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 Jam

Ingredients

Directions

Macerate

  1. Combine rhubarb, sugar, lemon rind, and lemon juice in a pan and let stand overnight.

  2. Strain off the juice and place it in a pan.

Cook and store

  1. Bring to a boil for 30 minutes.

  2. Add the rhubarb to the boiling juice and boil together for 10 minutes.

  3. Store in sterilized jars.

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. Sugar + lemontop 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).

Sugar and lemon 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 base and the body of the jam once cooked down.
Sugar
Sweetens the jam and helps it set into a thick, spreadable texture.
Lemon juice
Adds acidity that brightens the flavour and supports setting.

The step that matters

Boiling the juice before adding the rhubarb. Boiling the strained juice first concentrates it and begins thickening, so the rhubarb cooks in a syrup that can set. Adding fruit too early or boiling too briefly can leave the jam runny.

Swap the rhubarb

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

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

Fit is the average pairing score against sugar, 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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