In large mixing bowl, combine 1½ cups sugar, butter, shortening, eggs and vanilla. Using an electric mixer on medium speed, beat until creamed.
Reduce mixer to low and add in flour, cream of tartar, soda and salt; beat until just combined, scraping bowl often.
In small bowl, combine remaining ¼ cup sugar and cinnamon. Shape dough into 1-inch balls; roll in cinnamon sugar and place 2-inches apart onto ungreased baking sheet. Bake in a preheated 400°F oven 8-10 minutes or until edges are lightly browned.
Copyright © 2011 Supervalu, Inc. All Rights Reserved.