1.5 litres /
1kg Granulated sugar
The juice of 1/2 small lemon
Spread the sugar on a baking tray
and place in the oven at 100C along
with your empty jars.
Place a saucer or plate in the
freezer to cool.
Place the blackberries, blueberries
and the lemon juice in a large pan
and boil for about 20 minutes, until
the fruit is soft.
Add warmed sugar and stir till
Bring to the boil for about 10-15
minutes, stirring frequently until
the jam begins to thicken.
Test by drizzling a little on the
cold saucer. It should set in a few
seconds, otherwise continue boiling
Pour into warm jars.
Once cool, add wax discs to the top
of the jam, and add the lids.
Add labels and store in a cool dark
place for up to 12 months.