Mix all the cake ingredients according to the instructions on the box. Bake as directed.

In a blender, combine all the cheesecake filling ingredients and bake for 45 minutes.

Let both cool. Meanwhile, beat the cream cheese until smooth, then add the powdered sugar, and finally the butter.

Slice the cake into layers and remove the cheesecake from its pan.

Assemble the cake layers with the cheesecake filling and decorate with the cream cheese frosting.