Preheat oven to 350; grease and flour rectangular pan. If you want to use a square brownie pan, make just half the recipe.
Peel six medium apples and cut in small dice
Put apples in large mixing bowl and add:
2 cups sugar
1 1/2 sticks butter
2 1/2 cups flour
1 tsp. baking powder
1 tsp. baking soda
1 tsp. cinnamon
Add dry ingredients to apple mixture and mix well. Can add chopped walnuts if desired.
Bake 30 to 40 mins. at 350
Cut in squares when cool, and serve as you would brownies. Really moist, good snack cake.