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