Blackberry One Crust Pie

For this pie I used 1 package of store bought pie crust and placed each piece into seperate pie plator. Fro the filling i used 3 quarts of fresh blackberries, 2 C sugar and 1/2 C flour. Mix up the filling and split between the 2 pie crusts. Top with a few pats of butter on each pie. For the topping: Combine with a pastry blender, 1 C flour, 1 C brown sugar and 5 t butter. Cut in the butter until you have pea sized pieces. Split between the 2 pies and bake at 375 degree for 1 hour or until bubbly.