2 c. peanut butter
1/2 c. melted butter
2 3/4 c. powdered sugar
1 tsp. vanilla
1 (12 oz.) pkg. chocolate chips
1 tbsp. butter

Mix peanut butter, melted butter, powdered sugar and vanilla. Blend together and pat in lightly greased 9 x 13 inch pan. Melt chocolate chips and 1 tablespoon butter. Spread over peanut butter mixture. Cut into squares. Let cool 1 hour.