Ingredients:
1 box white or vanilla cake mix
1 can blueberry pie filling
1 tub whipped topping
Instructions:
Prepare and bake the cake according to the package directions in a 9×13-inch baking pan.
Allow the cake to cool completely.
Spread the blueberry pie filling evenly over the cooled cake.
Top with a thick, even layer of whipped topping.
Refrigerate for at least 1 hour before serving to allow the layers to set.