PREHEAT oven to 350° F.
SIFT flour, baking soda and salt into small bowl. Beat butter, granulated and brown sugars in large mixer bowl until smooth, about 3 minutes. Add egg; mix well. Gradually add flour mixture. Stir in morsels and orange zest. Drop by rounded teaspoonfuls onto ungreased baking sheets.
BAKE for 10 to 12 minutes or until light golden brown. Cool on baking sheets for 2 minutes; remove to wire racks to cool completely.