Cream butter and sugar together with electric mixer. Add eggs.

In separate bowl sift flour, tartar, baking soda, and salt together. Slowly combine with butter mix.

Chill dough in fridge for at least 15 minutes more if you can.

Meanwhile grease cookie sheet and make a cinnamon-sugar mix by combining 3 T sugar and 3 tsp. cinnamon in a shallow bowl.

When dough is chilled, take a small amount and roll into a ball about 1..5 -2 inches wide.

Then roll ball in cinnamon-sugar mix to coat and place on cookie sheet.

Bake for 8-10 minutes at 400 deg. Baking time varies depend upon size of dough balls so watch them close. Cool on rack.