With your mixer, combine all the cake ingredients, except the apple pie filling.
Gently stir in the apple pie filling.
Pour into a greased and floured 9x13 inch baking dish.
Mix together the flour, brown sugar, cinnamon and salt.
Then cut in the butter till the mixture is crumbly.
Spread the crumbly topping all over the top of the batter.
Bake in a preheated 350 degree oven for around 35 minutes, up to 45 minutes (start checking at 35)
Or until a toothpick inserted in the middle comes out clean.