Orange Cinnamon Ice Box Cookies

Our Granny (my dad's mother, Helen Mesa), would send us a box of homemade cookies every year. This is one of those cookie recipes.

2 1/2 c. powdered sugar
2 c. shortening
3 Tbsp. orange peel (I assume, grated)
2 eggs
5 c. flour
2 tsp. baking soda
2 tsp. cream of tartar
1 tsp. cinnamon powder

*Cream powdered sugar and shortening. Add egg, and beat.
*Sift dry ingredients and combine the two mixtures.
*Form into cookie rolls (refrigerate 1 hour for better handling), slice and bake.

(Once again, I assume a baking time of 8-10 minutes at 350 degrees).