Preheat oven to 375 degrees. In large bowl combine blackberries, sugar and lemon juice together with 2 tablespoons of flour. Pour into deep dish pie plate. In separate bowl blend remaining 1/2 cup flour, brown sugar and butter. Mix until crumbly. Sprinkle over berries. Bake for 30 minutes until bubbly.
Recipe Courtesy of Food Network Kitchens