Preheat your oven to 350°F (175°C).

Cream together 1 cup of shortening and 1-1/2 cups of sugar in a large bowl until light and fluffy.

Beat in the 2 large eggs, one at a time.

Sift together 2-3/4 cups of all-purpose flour, 2 teaspoons of cream of tartar, 1 teaspoon of baking soda, and 1/2 teaspoon of salt in a separate bowl.

Combine the dry ingredients with the wet mixture gradually.

Mix 4 teaspoons of ground cinnamon with the remaining sugar in a small bowl.

Roll the dough into balls, about 1-inch in diameter, and coat each in the cinnamon-sugar mixture.

Place the coated dough balls on a baking sheet.

Bake for about 10 minutes, or until lightly browned.

Cool the cookies on a wire rack.