Makes 1
40 minutes


  • 400g of blueberries
  • 300g of sugar
  • 1 tbsp of lemon juice, (fresh)


Begin by putting a plate in the freezer. This will help you test when the jam is ready later on
Place the blueberries in a heavy-based pan and gently crush with a potato masher, just enough to release some of the juices
Add the sugar and lemon juice to the pan and leave to simmer on a low heat. Stir to prevent sticking
Cook down for 25 minutes and skim off any scum that has settled on the surface
To test if the jam is the correct consistency, remove the plate form the freezer and spoon a little jam onto the plate. Place in the fridge to set for a couple of minutes. If the jam forms a skin and sets then it is ready to jar. If not, return to the heat and continue cooking, repeating the test every 5 minutes
Leave to sit for 15 minutes to cool slightly – this allows the berries to settle evenly instead of floating to the top when you transfer to the jars
Spoon the jam into the sterilised jar, seal, and label with the date. The jam will keep in a cool dark place for 1 year, once opened keep in the fridge