Delicious dessert coffee cake for any season or any reason ;)
Preheat oven to 350°.
Beat cake mix, eggs, and cinnamon sugar together for 2 minutes.
Add in apple pie filling and beat for an additional minute.
Pour into greased 9×13 pan.
Mix butter, sugar and flour together in separate bowl.
Sprinkle over the cake mixture.
Bake at 350° for about 45 minutes.