In a small bowl, combine blackberries, sugar, andorange zest. Leave it for 20 minutes until it becomes a syrup.
Preheat oven to 375°F. In a medium bowl, whisktogether flour, baking powder, melted butter, and milk.
Then pour mixture into an ungreased 8-inch bakingdish
Pour the berry mixture on top and bake for 40-50minutes, until golden brown.