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Fruit Jellies

A sweet preserve made by boiling fruit juice with sugar until it sets into jelly.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Red currant and black currant share more aroma than cooks usually use. They rank in the top 1% of all ingredient pairs, and cooks put them together in 72 recipes. Both carry isoamyl acetate, which smells banana, pear. The science ↓

Fruit Jellies

Ingredients

Directions

Make the syrup

  1. In a kettle, combine 2 pounds of sugar with just enough water to dissolve it.

  2. Constantly skim the foam while boiling until the sugar becomes brittle.

  3. To test, dip your finger in cold water, then in the syrup, and back in cold water; it should form a solid, transparent coating.

Make the jelly

  1. Once the sugar is brittle, add the fruit juice and boil until it drips in jelly from a spoon.

  2. If the jelly swells or foams, add a few drops of refined cotton or salad oil to bring it back to the proper level.

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. Red currant + black curranttop 1% of all pairs
    Smell alikestrong
    Cooked together72 recipes

    Shared aroma: isoamyl acetate (banana, pear).

  2. Apple + peartop 1% of all pairs
    Smell alikestrong
    Cooked together649 recipes

    Shared aroma: isoamyl acetate (banana, fruity).

  3. Pear + quincetop 1% of all pairs
    Smell alikestrong
    Cooked together133 recipes

    Shared aroma: ethyl isobutyrate (fruity, ethereal).

  4. Apple + quincetop 1% of all pairs
    Smell alikemoderate
    Cooked together506 recipes

    Shared aroma: ethyl isobutyrate (fruity, ethereal).

  5. Apple + black curranttop 6% of all pairs
    Smell alikestrong
    Cooked together39 recipes

    Shared aroma: damascenone (apple, rose).

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

What each ingredient does

Sugar
Sugar cooks down to a brittle syrup that gives the jelly its set and sweetness.
Fruit juice
Juice supplies the flavor and the natural pectin and acidity that help the jelly set.

The step that matters

Testing the sugar stage before adding juice. Boiling sugar must reach the brittle stage, where the cold-water test forms a solid coating, before juice is added. Too little cooking leaves the jelly soft and runny, while overcooking makes it tough and sticky.

Swap the black currant

How well each one fits the dish's main ingredients (apple, pear, quince, red currant, sugar):

  1. Plumfits better
  2. Apricotfits better
  3. Peachfits better
  4. Black currantthe original

Fit is the average pairing score against apple, pear, quince, red currant, 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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