Ingredients: Cake - 1 white cake mix 1/3 cup oil 2 eggs 1/2 cup water 1 can (21 ounces) apple pie filling Glaze - 1 tablespoon margarine, melted 1 cup powdered sugar 1/2 teaspoon vanilla extract hot water Directions: Preheat oven to 350 degrees. Mix together cake mix, oil, eggs, and water. Pour mixture into a greased 9x13-inch pan. Marble in apple pie filling. Bake 30-35 minutes. Combine margarine, powdered sugar, vanilla, and hot water. Drizzle glaze over cake. ??? -- how much hot water?