Rhubarb and Ginger Jam
A vibrant, tart-sweet Welsh preserve pairing tender spring rhubarb with warming stem ginger. Perfect on hot buttered toast, crumpets, or fresh scones.

- Prep
- 20 min
- Cook
- 25 min
- Total
- 45 min
- Servings
- 20
- Difficulty
- Easy
- Calories
- 115 kcal
Equipment
- โขLarge heavy-based saucepan or preserving pan
- โขWooden spoon
- โขSmall saucer
- โขLadle and jam funnel
- โขSterilised glass jars with lids
Nutrition
Per serving, approximate
- Calories
- 115 kcal
- fat
- 0.1 g
- carbs
- 29 g
- fibre
- 0.9 g
- protein
- 0.4 g
- calories
- 115 kcal
Instructions
- 1
Place a small ceramic saucer in the freezer to chill for testing the jam set later.
- 2
Put the chopped rhubarb, sugar, fresh ginger, stem ginger, syrup, lemon zest, lemon juice, and water into a large preserving pan.
- 3
Stir gently over low heat on the hob until all the sugar crystals have completely dissolved.
- 4
Increase the heat to medium-high and bring the mixture to a rolling, vigorous boil.
- 5
Boil rapidly for 12 to 15 minutes, stirring frequently to prevent fruit sticking to the base.
- 6
Remove the pan from the heat and spoon a little hot jam onto the cold saucer.
- 7
Push the edge of the jam with your fingertip after one minute to check if it wrinkles.
- 8
Return the pan to a boil for 2 more minutes if it remains runny, then test again.
- 9
Skim off any surface foam using a clean spoon, then let the jam settle for 5 minutes.
- 10
Ladle the hot jam carefully into warm, sterilised glass jars, leaving 1cm of headspace.
- 11
Seal the jars tightly with clean lids and leave them upright to cool completely.
Chef's tips
Ensure the sugar is fully dissolved over low heat before bringing the pan to a rolling boil to prevent a grainy texture. Do not skip the lemon juice, as rhubarb is low in natural pectin and needs acidity to help the jam set firmly. Use pink early-season garden rhubarb for the prettiest rosy colour.
Ingredient substitutions
- stem ginger in syrup โ an extra 20g of fresh grated root ginger plus 2 tbsp golden syrup
- granulated white sugar โ jam sugar with added pectin for a firmer set in less boiling time
Storage
Store unopened sealed jars in a cool, dark cupboard for up to 12 months, and refrigerate after opening for up to 6 weeks.
Reheating
Serve at room temperature, or gently warm individual spoonfuls in a small heatproof dish over hot water if desired.
Common mistakes to avoid
- โขBoiling the jam before the sugar has completely dissolved, which causes recrystallisation and gritty jam.
- โขOvercooking the rhubarb until it turns into a dark brown paste rather than a vibrant, soft preserve.
- โขPouring boiling jam into cold glass jars, which can cause the glass to crack.
Serving suggestions
Cooked Rhubarb and Ginger Jam?
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