1/3 cup butter, softened
1 cup granulated sugar
3 egg whites
2 3/4 cups flour
2 teaspoons cream of tartar
1 teaspoon baking soda
1/4 teaspoon salt
2/3 cup low-fat buttermilk
2 teaspoons ground cinnamon
2 tablespoons granulated sugar

Preheat the oven to 400 degrees F. Spray a baking sheet with nonstick cooking spray and set aside.

Mix together the butter and sugar, add the egg whites and beat well.

In another bowl, combine the flour, cream of tartar, baking soda and salt.

Add the buttermilk and the dry mixture to the butter mixture, and stir to combine.

Combine the cinnamon with the 2 tablespoons of sugar.

Taking a teaspoonful of dough at a time, roll the dough into a ball in your hands, then roll it in the cinnamon-and-sugar mixture.

Place on the prepared baking sheet 2 inches apart and bake in the preheated oven for about 8 minutes, or until lightly browned.

Nutritional values per cookie: 45 calories; 1 gram fat; 3 milligrams cholesterol; 46 milligrams sodium; 8 grams carbohydrates; 1 gram protein; trace of fiber