Heat oven to 350. Grease 13x9x2-inch baking pan. Melt butter. Add peanut butter; stir until melted. Stir in sugar and vanilla. Add eggs; with spoon, stir until well blended. Add flour, baking powder and salt; stir until blended. Stir in chocolate chips. Spread batter into prepared pan. Bake 35 minutes or until top is golden brown and edges are firm. Cool completely in pan on wire rack. Cut into bars.
2001, 2020, 2023