Preheat oven to 350ºF.

In medium bowl, combine flour, baking powder and salt; set aside. In large bowl, cream butter, sugars and zest with electric mixer at medium speed until light and fluffy. Add eggs, one at a time, mixing well after each. Add flour mixture to butter mixture; blend well. Stir in chocolate chips. Drop by tablespoonful or cookie scoop onto ungreased cookie pan.

Bake 13 to15 minutes or until edges are golden brown. Cool 3 minutes on pan; remove and cool completely on cooling grid.