preheat oven to 350. spray 13 x 9 in. psn with cooking spray

cream butter and sugar. let cool for a few min. add eggs and vanilla and mix well.

combine flour, baking powder and salt. stir into egg mixture. stir in chips and nuts. (batter will be stiff)

pour batter into pan. if desired, sprinkle more nuts and chocolate chips

bake 35-40 min.