Why it works: Rhubarb and almond match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 117 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Rhubarb Jam
Ingredients
Directions
Prepare
Peel and cut rhubarb into small pieces, then weigh the rhubarb.
Cook the jam
In a pot, bring the rhubarb to a slow boil.
Add the sugar, lemon rind, almonds, and butter, stirring constantly.
Skim the mixture carefully.
Boil quickly until it sets on a plate, about 1.5 hours.
Stir in whiskey just before finishing.
Jar
Pour the jam into jars and seal them.
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 + almondtop 1% of all pairsSmell alikestrongCooked together117 recipes
Shared aroma: coumarin (sweet, hay).
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Rhubarb + lemontop 7% of all pairsSmell alikestrongCooked together546 recipes
Shared aroma: acetic acid (sour, vinegar).
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Lemon + almondtop 10% of all pairsSmell alikestrongCooked together5,655 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Almond + buttertop 11% of all pairsSmell alikemoderateCooked together9,245 recipes
Shared aroma: 2,3-pentanedione (butter, sweet).
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Lemon + buttertop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Rhubarb
- Provides the main fruit body and tart flavour that the jam is built on.
- Sugar
- Sweetens the jam and, with boiling, thickens it into a spreadable set.
- Lemon rind
- Adds bright acidity and aromatic oils that balance the sweetness.
- Butter
- Added in small amount to help reduce foaming during the boil.
The step that matters
Boil quickly until it sets on a plate. Sugar and fruit pectin set only at a sufficiently high concentration reached by boiling. Undercooking leaves a runny jam, while overcooking can make it stiff and dull in flavour.
Swap the lemon
How well each one fits the dish's main ingredients (rhubarb, sugar, almond, butter):
- Vanillafits better
- Figfits better
- Raisinfits better
- Lemonthe original
Fit is the average pairing score against rhubarb, sugar, almond, butter. 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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