Gather ingredients, a large mixing bowl, and an electric mixer.

Preheat the oven to 350.

Cream together butter, shortening, 1 1/2 cups sugar, the eggs and the vanilla.

Add the flour, cream of tartar, soda and salt

Mix well.

In a small bowl, combine 2tbsp sugar and cinnamon.

Roll a heaping tablespoon of dough into a ball.

Put the ball into the cinnamon sugar mixture.

Coat completely.

Space the balls on a baking sheet with parchment paper or a silicone mat. Balls should be approximately 2 inches apart.

Bake for 8-12 minutes.

Remove when cookies are set but not hard. Cool on a cooling rack.