1 c. flour
1 tsp. baking powder
1/4 tsp. salt
1/3 c. butter
1/2 c. peanut butter
1 c. sugar
1/4 c. brown sugar
2 eggs
6 oz. semi-sweet chocolate pieces
1/2 tsp. vanilla

Preheat oven to 350 degrees. Grease 9-inch square pan. Sift together flour, baking powder, and salt; set aside. Cream butter and peanut butter until light and fluffy. Add sugars, beat. Add eggs, beat well. Gradually stir in flour mixture, beat until smooth. Add chocolate and vanilla. Mix well. Spread in greased 9-inch square pan. Bake 25-30 minutes. Cool. Cut into 16 squares.