1 (10-ounce) package fresh or frozen blackberries |
3 tablespoons blackberry jam |
1 (9-inch) store-bought graham cracker pie crust or paula's pie crust, recipe follows |
1 (8-ounce) tub whipped topping |
1 3/4 cups graham cracker crumbs |
1/4 cup sugar |
5 tablespoons butter, melted |