Preheat oven to 350° F.
Line muffin tin with paper liners.
Prepare cake batter according to directions on box.
Fill batter in muffin tins, about 3/4 full. Add dollop of pie filling in the center of the batter. Bake for 12-15 minutes until done.
Make the cobbler topping: In medium bowl, combine sugar, flour, brown sugar, butter, water and nuts until blended and chunky.
Let cupcakes cool and top them with a small amount of remaining pie filling and then cobbler topping.