My cousin gave me this recipe when I was asking "what can I do with all these blackberries I have picked." I wanted a change from pie and crumble. She came up with this. Serve with ice cream, clotted cream, crème fraiche, or I like it with a big dollop of Greek yogurt.
This cake is best eaten within 2 days, but if it is anything like my house it won't last the afternoon.