1/2 c. chunky peanut butter
3/4 c. brown sugar
2 eggs
1 c. flour
1/4 tsp. salt
1/3 c. butter
3/4 c. granulated sugar
2 tsp. vanilla
1 tsp. baking powder

Mix and spread in greased 9x13 inch pan. Spread 1 (12 oz.) package chocolate chips over above mixture. Bake for 5 minutes at 350 degrees. Then swirl the chips with a knife. Continue to bake for 25 minutes at 350 degrees.