Grandma's Blackberry Jam-400g.

Its the best!  Wild blackberries were commonplace one upon a year. All the kids used to collect them in the summer months and mum or grannie made jam. No longer do they seem to be around as much. So its pretty special when we can get blackberries and this jam doesn't t last long on the shelves and the same will occur when you take it home.
400g of blackberry jam in a round jar.