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Dessert

Rhubarb and Apple Jelly

A preserved fruit jelly made from rhubarb, apples, lemon juice, water, and sugar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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 and Apple Jelly

Ingredients

Directions

Prepare the juice

  1. Combine rhubarb, apples, lemon juice and rind, and water in a preserving kettle.

  2. Boil until reduced to a pulp.

  3. Strain the juice through a jelly strainer.

Make the jelly

  1. Weigh the juice and add 1 pound of sugar for every pound of juice.

  2. Boil the juice, add the sugar, and skim well.

  3. When it jellies on the skimmer, pour into jars and seal when cold.

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. Rhubarb + appletop 9% of all pairs
    Smell alikemoderate
    Cooked together162 recipes

    Shared aroma: methyl cinnamate (strawberry).

  3. Apple + lemontop 14% of all pairs
    Smell alikemoderate
    Cooked together7,551 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

  4. Apple + sugartop 18% of all pairs
    Smell alikelow
    Cooked together16,478 recipes

    Shared aroma: beta-damascenone (apple, rose).

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

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

Apple and sugar barely smell alike, yet cooks put them together in 16,478 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
Adds tartness and acidity that balances the sweetness of the sugar.
Apples
Supply natural pectin that helps the juice set into a jelly.
Lemons
Add acidity and extra pectin, helping the jelly set and brightening the flavor.
Sugar
Sweetens the jelly and, with pectin and acid, helps it gel and keep well.

The step that matters

Judging when the jelly sets. Boiling drives off water and concentrates sugar, pectin and acid so the juice gels. Overcooking can make it stiff, while undercooking leaves it runny. Testing a spoonful on a cold skimmer shows whether it has reached the gel point.

Swap the apple

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

  1. Orangefits better
  2. Vanillafits better
  3. Limefits better
  4. Applethe original

Fit is the average pairing score against rhubarb, 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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