Had more blackberries in my big chest freezer than I realised so, as I desperately needed the room I though it was the best course of action! Once defrosted I had 7 lbs of fruit but no lemons in the house to help with the set ( I was told there was not so much pectin in late picked blackberries) but I ploughed on anyway!! Took the best part of an hour of boiling to get it to set but it did - thankfully ...and it tastes divine
