Making a batch of blackberry ... If you don’t have a sugar thermometer, a few hours before you want to make your jam, put a couple of small plates or saucers into your freezer.

If you love blackberry jam without seeds ... For every 600ml/1 pint weigh 450g/1lb sugar. Put the juice and sugar back into the clean preserving pan, heat over a low heat until all the sugar ...

This quick and easy Instant Pot Mixed Berry Jam recipe is a great way to use up fresh or frozen berries. Perfect for ...