Pour crushed pineapple into a greased 13”x9”x2” baking dish. Pour blackberry mix over pineapple. Spread the dry cake mix evenly over pineapple/blackberry mixture. Drizzle butter over top of cake mix. Sprinkle with pecans. Bake at 325° for 35-40 minutes until browned on top. Serve with Terrific Whipped Topping. If you don’t mind the seeds you can add a package of frozen blackberries to the pineapple.