Preheat oven to 350°F.

Measure flour, cream of tartar, baking soda, and salt in a sifter. Sift, and set aside.

Mix shortening, sugar, and egg together with an electric mixer until creamy.

Slowly mix in the dry ingredients to the wet. Small amounts at a time. Stir until blended.

Roll dough into walnut sized balls and roll in cinnamon sugar. Place on ungreased cookiesheet about 2 inches apart.

Bake for 8 to 10 minutes. Cookies are done when the edges of the cookies just slightly begin to gain color. Cracks will form with small bubbles popping. You do not want a golden color.