PREHEAT oven to 350° F. Grease 15 x 10-inch jelly-roll pan.
COMBINE flour, baking powder and salt in small bowl. Beat sugar and butter in large mixer bowl until creamy. Beat in eggs and vanilla extract; gradually beat in flour mixture. Stir in morsels. Spread into prepared pan.
BAKE for 20 to 25 minutes or until top is golden brown. Cool in pan on wire rack.