Wash 1kg raspberries if necessary and place in a large preserving pan.
Wash and string 500g redcurrants and add to the pan. Stir in 500ml water. Bring to the boil, then reduce the heat to a gently simmer and cook for about 15 minutes until the fruit is very tender.
Add 1½kg sugar and heat, gently stirring until the sugar has dissolved.
Once all the sugar has dissolved increase the heat and boil rapidly for about 10 minutes or until setting point is reached.If you use a thermometer, boil until the jam reaches 105℃/220°F.
Pour into hot jars and cover. Label when cold.
Notes
Cook's Notes
For a less seedy jam, cook the redcurrants and raspberries separately until softened (add half the quantity of water to each). Then, strain the redcurrants through a fine sieve, squeezing out as much of the juices as possible, and add the juice to the raspberries.
Place a couple of sauces into the fridge before starting, ready for testing the jam for setting point or use a thermometer.
StoreThe jam will keep for up to 1 year unopened if stored in a cool dark place after which the flavour will deteriorate. Once open keep in the fridge and use within 6 weeks.Nutrition information is calculated based on this jam making 6 x 450g (1lb) jars and each serving being 25g (1oz)