Heat oven to 350°F In large bowl, beat sugars, butter, shortening, vanilla and eggs with electric mixer on medium speed, or mix with spoon, until creamy. Stir in flour, baking soda and salt. Stir in white, butterscotch and chocolate chips.
Drop dough by 1/4 cupfuls about 3 inches apart onto un-greased large cookie sheet.
Bake 12 to 15 minutes or until light golden brown. Cool 4 minutes; remove from cookie sheet to wire rack.