Why it works: Rhubarb and sugar are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 1,852 recipes. Both carry 1-penten-3-one, which smells fish, pungent. The science ↓
Rhubarb Isinglass Jelly
Ingredients
Directions
Prepare the juice
Wash and slice the rhubarb without peeling, removing any coarse or discolored parts.
In an enamelled stewpan, combine the rhubarb and water, then add the sugar.
Boil gently for 20 minutes until the rhubarb is stewed but not thickened.
Strain the mixture through a muslin cloth folded in four to obtain the juice.
Make the jelly
Measure 1 ½ pints of the juice and heat it in a clean pan.
Add the isinglass and the large lumps of sugar, stirring until dissolved.
Boil quickly for a few minutes to remove scum, then clear it off carefully.
Strain the jelly twice through the muslin cloth, let it cool, and mold as desired.
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.
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Rhubarb + sugartop 18% of all pairsSmell alikemoderateCooked together1,852 recipes
Shared aroma: 1-penten-3-one (fish, pungent).
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 pink colour, and its juice forms the base of the jelly.
- Isinglass
- Gelatine-like protein that sets the juice into a firm, wobbly jelly when cooled.
- Sugar
- Adds sweetness that balances the tartness of the rhubarb juice.
The step that matters
Boil quickly to remove scum, then clear it off carefully. Isinglass must be fully dissolved in hot juice, and the brief rolling boil lifts impurities to the surface. Skimming gently keeps the jelly clear rather than cloudy.
“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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