Making a batch of blackberry jam is a wonderful way to bottle ... remaining berries are almost submerged in their juice. Begin to add the sugar to the berries, a third at a time, stirring between ...

If you love blackberry jam without seeds ... 130C/250F/Gas ½ for 10-15 minutes. Measure the juice. For every 600ml/1 pint weigh 450g/1lb sugar. Put the juice and sugar back into the clean ...