Why it works: Ginger and lemon match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 5,154 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓
Rhubarb Jam
Ingredients
Directions
Prepare
Peel and cut the rhubarb into short lengths.
Spread the sugar over the rhubarb and let it sit overnight.
Strain off the juice and place it in a preserving pan.
Cook the jam
Add ground ginger, lemon rind, and lemon juice to the mixture.
Heat the mixture by the fire, stirring until it reaches boiling point.
Add the rhubarb and boil for 30 to 40 minutes.
Fill jam pots and cover with paper while hot.
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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Ginger + lemontop 5% of all pairsSmell alikestrongCooked together5,154 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Rhubarb + gingertop 7% of all pairsSmell alikemoderateCooked together241 recipes
Shared aroma: acetic acid (sour, vinegar).
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Rhubarb + lemontop 7% of all pairsSmell alikestrongCooked together546 recipes
Shared aroma: acetic acid (sour, vinegar).
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Sugar + gingertop 17% of all pairsSmell alikelowCooked together14,054 recipes
Shared aroma: 1-penten-3-one (fish, pungent).
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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
Sugar and ginger barely smell alike, yet cooks put them together in 14,054 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 bulk and tart flavour that forms the body of the jam.
- Preserving sugar
- Sweetens the jam and, with boiling, helps it set and keep.
- Lemons
- Add acidity and natural pectin that help the jam set and brighten the flavour.
The step that matters
Boil the rhubarb for 30 to 40 minutes. Boiling drives off water and concentrates the sugar until the jam reaches a set point. Under-boiling leaves it runny and prone to spoiling, while over-boiling can scorch the sugar and darken the flavour.
Swap the rhubarb
How well each one fits the dish's main ingredients (sugar, ginger, lemon):
- Cinnamonfits better
- Turmericfits better
- Corianderfits better
- Rhubarbthe original
Fit is the average pairing score against sugar, ginger, lemon. 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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