The flavour of this jam depends a lot on the blackberries you use. We picked plump, juicy, ripe blackberries to make a sweet, delicious jam for toast, home made doughnuts and more.
Ingredients
250g (9oz)fresh blackberries
250g (9oz) jam sugar
2tbs lemon juice (if from a bottle)/ juice from ½ lemon if using fresh lemon
Instructions
(If you're using a stove to make jam, you'll need a sugar thermometer to check when your mixture is at 100C/212F. If you're using a breadmachine with a jam function, follow manufacturer instructions. For a Thermomix, cook at 100 degrees at speed 2. )
Place all ingredients in bowl and cook for 40 minutes at 100C or 212F.
To check whether your jam has set, tilt the bowl slightly, being careful not to spill boiled sugar! Check to see whether a slight gel forms on top. If not, return to heat for five minute intervals. Your external temperature will affect how long your jam has to boil.
It shouldn't take over 50 minutes, but if it does, turn the heat up as high as possible (watching it doesn't burn) for 3 minutes.
Pour jam into sterilised jars and leave overnight to cool.
Recipe by Keeper of the Kitchen at https://www.keeperofthekitchen.com/2013/09/20/blackberry-jam-blackberry-jelly/