Cream butter, brown sugar, eggs and vanilla with a mixer. In another bowl whisk together flour, baking powder, salt and cinnamon.
Add to creamed mixture and mix until all ingredients are wet. Fold in chopped apples with a spoon. Spray a 9 inch deep dish pie plate with cooking spray.
Pour in batter and sprinkle chopped nuts on top. (You can fold nuts into batter if you want) Bake in a preheated 350 degree oven for 30 to 35 minutes testing center to see if done. Serve with ice cream or whipped cream on top while warm from the oven.