Step 1

Heat oven to 400°F. In small bowl, mix red sugar and 1 1/2 teaspoons of the cinnamon; set aside. In another small bowl, mix green sugar and remaining 1 1/2 teaspoons cinnamon; set aside.

Step 2

In large bowl, beat sugar, shortening, butter and eggs with electric mixer on medium speed, or mix with spoon. Stir in flour, cream of tartar, baking soda and salt.

Step 3

Shape dough into 3/4-inch balls. Roll in sugar-cinnamon mixtures. Place about 2 inches apart on ungreased cookie sheet.

Step 4

Bake 8 to 10 minutes or until centers are almost set. Cool 1 minute; remove from cookie sheet to wire rack. Cool completely, about 30 minutes.