Why it works: Plum and apple match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 404 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓
Damson Jelly
Ingredients
Directions
Prepare the juice
Bake the damsons in a slow oven or boil them in a pan of water until soft.
Pour off the clear juice from the fruit, strain, and weigh it.
Cook and set
Boil the juice quickly without sugar for 25 minutes.
Remove from heat and stir in 10 ounces of sugar for each pound of juice.
Boil quickly for 6 to 10 minutes, stirring constantly and removing any scum.
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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Plum + appletop 2% of all pairsSmell alikestrongCooked together404 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Sugar + appletop 18% of all pairsSmell alikelowCooked together16,478 recipes
Shared aroma: beta-damascenone (apple, rose).
-
Plum + sugartop 21% of all pairsSmell alikelowCooked together2,313 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
- Damsons
- Provide the fruit's natural pectin and acidity, which allow the juice to set into a jelly.
- Sugar
- Adds sweetness and helps the jelly set and keep its texture.
- Pearmains or other fine boiling apples
- Add extra pectin to help the jelly set firmly.
The step that matters
Boiling the juice with sugar for 6 to 10 minutes. Sugar must dissolve fully before a rapid boil, and the mixture needs enough time at a hard boil for pectin, sugar and acid to reach a set. Stirring prevents scorching at the base, and skimming removes scum that would cloud the jelly.
Swap the plum
The recipe marks plum as optional. How well each one fits the dish's main ingredients (sugar, apple):
- Pearfits better
- Vanillafits better
- Apricotfits about as well
- Plumthe original
Fit is the average pairing score against sugar, apple. 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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