Mix all the filling ingredients together in a large bowl. Pour into a 9x13 baking dish.
Sprinkle cake mix evenly over the whole pan.
Pat the cake mix down a little then pour melted butter evenly over the top. Then sprinkle with cinnamon and sugar (and pecans-optional).
Bake at 350 for 60 minutes. A knife inserted in the center should come out clean when it is done.
Let it cool and serve with cool whip or vanilla ice cream over the top.
