Mrs. Sigg’s Snickerdoodles

Mrs. Sigg’s Snickerdoodles ½ cup butter (softened)½ cup shortening1 ½ cups white sugar2 eggs2 teaspoons vanilla extract2 ¾ cups all-purpose flour2 teaspoons cream of tartar1 teaspoon baking soda¼ teaspoon salt2 tablespoons white sugar2 teaspoons ground cinnamon...