Low Sugar Blueberry & Raspberry Jam is a delicious fruity spread made with fresh or frozen blueberries and raspberries. It has two-thirds less sugar than traditional jams and jellies and is easy to make in a small batch.
Put the blueberries, raspberries, water and lemon juice into a pan.
Cook the fruit gently until it is soft.
90 grams sugar
Add the sugar and heat gently until it has dissolved.
Bring to a rolling boil and boil for about 3-4 minutes, stirring occasionally to check that the jam is not catching on the bottom of the pan.
When the jam starts to thicken, remove it from the heat.
Check the set by putting a teaspoon of jam on a cold sauce and place it in the fridge for 5 minutes. Push your finger into the jam and it should leave a clear space in the middle of the jam.
If it has not set then return it to the heat and cook for another minute or two.
When your finger leaves a clear space through the jam on the saucer it is ready.
Spoon it into a sterilised jam jar and seal with a lid.
Notes
This recipe makes one jar of low sugar jam. Double the quantities to make a larger batch but any more than double is likely to lead to poor results. Better to make more smaller batches than try to get the jam to set in a large batch.