Chocolate Chip Thin Mint Cookies

flour 1/2 teaspoon baking soda 1/2 teaspoon salt 1 stick butter, softened 6 tablespoons sugar 6 tablespoons brown sugar 1 egg 3/4 teaspoon vanilla 1/4 teaspoon peppermint extract 11 broken pieces Thin Mint Cookies 1 cup semi-sweet chocolate chips