Snickerdoodles

1 1/2 C sugar
1/2 C butter softened
1/2 C shortening
2 large eggs
2 3/4 C flour
2 tsp cream of tartar
1 tsp baking soda
1/4 tsp salt
1/4 C sugar
2 tsp ground cinnamon

Heat oven to 400 deg. In large bowl, beat 1 1/2 cups sugar, butter, shortening and eggs. Stir in flour, cream of tartar, baking soda and salt. Shape dough into balls. In small bowl mix 1/4 cup sugar and the cinnamon. Roll balls in cinnamon-sugar mixture. Place on ungreased cookie sheet. Bake 8 - 10 minutes.