Snickerdoodles

My elder sister always made these cookies for the holidays, and I wanted to post the recipe— the particular one from the particular cookbook— but I didn't have it! Google to the rescue:

You will need:
1 1/2 cups sugar
1/2 cup butter or margarine, softened
1/2 cup shortening
2 eggs
2 3/4 cups all-purpose flour
2 teaspoons cream of tartar
1 teaspoon baking soda
1/4 teaspoon salt
1/4 cup sugar
2 teaspoons ground cinnamon

Heat oven to 400ºF. Mix 1 1/2 cups sugar, the butter, shortening and eggs in large bowl. Stir in flour, cream of tartar, baking soda and salt. Shape dough into 1 1/4-inch balls. Mix 1/4 cup sugar and the cinnamon. Roll balls in cinnamon-sugar mixture. Place 2 inches apart on ungreased cookie sheet. Bake 8 to 10 minutes or until set. Remove from cookie sheet to wire rack.

Thank you, online Betty Crocker!