Preheat oven to 400 degrees.
Cream together the butter, shortening, 1 ½ cups of the sugar, the eggs and vanilla.
Blend in the flour, baking soda, salt and cream of tartar.
Shape dough by rounded tablespoons into balls.
Mix the reaming sugar and the 2 teaspoons of cinnamon together in a bowl.
Roll the balls of dough into the cinnamon and sugar mixture.
Place on an ungreased baking sheet.
Bake for 8-10 minutes or until set but not too hard.
Remove immediately from baking sheet and onto wired racks to cool completely.
Store in an air tight container.