Preheat oven to 350 and spray a loaf pan with nonstick cooking spray and set aside.

Add butter and ⅔ cup white sugar to a mixing bowl and beat well until light and fluffy. Beat in eggs and vanilla. Add flour, baking powder and salt and beat until combined. Beat in milk until batter is smooth.

Pour half of the batter into the loaf pan.

Mix together the apples, 1 teaspoon ground cinnamon and white sugar and sprinkle half of the apples onto the batter in the pan. Repeat layers, finishing with apples on top.

Mix together brown sugar and cinnamon and sprinkle on top.

Bake for 50-60 minutes or until a toothpick inserted in the center comes out clean. Let cool completely before removing from pan and slicing.