Preheat oven to 400 degrees.

Cream together butter, shortening, 1 1/2 cups sugar, the eggs and the vanilla. Blend in the flour, cream of tartar, soda and salt.

Shape dough by rounded spoonfuls into balls. Mix the 2 tablespoons sugar and the cinnamon. Roll balls of dough in mixture. Place 2 inches apart on ungreased baking sheets.

Bake 8 minutes, or until not too brown. Remove immediately from baking sheets.