1Heat oven to 350°F. Beat sugar, butter, shortening, vanilla and eggs in large bowl with electric mixer on medium speed until light and fluffy, or mix with spoon. Stir in flour, baking soda and salt. Stir in mint chips.
2Drop dough by rounded teaspoonfuls about 2 inches apart onto ungreased cookie sheet.
3Bake 11 to 13 minutes or until light golden brown. Cool 30 seconds; remove from cookie sheet to wire rack.