the best we've ever had.
Preheat oven to 350.
Mix butter, 1 1/2 cups sugar & eggs.
Combine flour, cream of tartar, baking soda & salt.
Blend dry into wet ingredients.
Chill dough 5 – 10 mins.
Mix 3 Tbs sugar & cinnamon.
Place on ungreased cookie sheet.
Sprinkle with cinnamon mix.
Bake for 10 mins.