Why it works: Rhubarb and apple work together. They rank in the top 9% of all ingredient pairs, and cooks put them together in 162 recipes. Both carry methyl cinnamate, which smells strawberry. The science ↓
Rhubarb Jelly
Ingredients
Directions
In a preserving kettle, combine rhubarb and water.
Simmer until the rhubarb is soft.
Squeeze the mixture through a jelly bag to extract the juice.
For each pint of juice, add 1 pound of sugar and continue cooking according to general jelly-making directions.
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.
Photo for illustrative purposes only · Contact us to use it
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.
-
Rhubarb + appletop 9% of all pairsSmell alikemoderateCooked together162 recipes
Shared aroma: methyl cinnamate (strawberry).
-
Sugar + appletop 18% of all pairsSmell alikelowCooked together16,478 recipes
Shared aroma: beta-damascenone (apple, rose).
-
Rhubarb + sugartop 18% of all pairsSmell alikemoderateCooked together1,852 recipes
Shared aroma: 1-penten-3-one (fish, pungent).
Sugar and apple 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
- Provides the tart flavour and the juice that becomes the jelly.
- Sugar
- Adds sweetness, balances the tartness, and helps the juice thicken into a set jelly.
The step that matters
Adding sugar per pint of juice. Sugar must be measured against the juice volume and cooked to the right concentration. Too little sugar can leave the jelly loose, while overcooking can make it stiff or grainy as the sugar and fruit acids work together to form a gel.
Swap the apple
The recipe marks apple as optional. How well each one fits the dish's main ingredients (rhubarb, sugar):
- Vanillafits better
- Figfits better
- Quincefits better
- Applethe original
Fit is the average pairing score against rhubarb, 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.

Apple Pudding256 recipes
Rhubarb Pie152 recipes
Apple Cake80 recipes
Apple Meringue75 recipes