Preheat oven to 350º F.

Combine all the dry ingredients of the cake and mix well.

Add all of the liquid ingredients and fold the batter until just combined.

The batter should be thick and nearly dough-like, as this will prevent the filling from sinking to the bottom of the pan.

Spread 1/2 of the batter in the bottom of a 9×11″ (or whatever) greased baking dish.

Add apple pie filling evenly over the top.

Spoon the rest of the batter over the top in clumps, leaving some of the apple filling showing through.

Sprinkle with cinnamon sugar mixture.

Bake for 80 to 90 minutes or until a tester comes out clean.

Be sure not to under bake.

You may wish to cover the coffee cake with aluminum foil for the last 20-30 minutes to prevent over-browning.

Remove coffee cake from oven and let cool before serving.