Fluffy Sugar Cookies - cooking recipe

Ingredients

2 cups flour
1/2 teaspoon baking soda
1/2 teaspoon salt
1 egg yolk
1 egg white, beaten until stiff
1/2 cup sour milk
1 cup soft butter
1/2 cup white sugar
1/2 cup brown sugar

Preparation

Cream together butter, sugars, egg yolk and sour milk (I add 1 tbsp of sour cream to milk and whisk).
Mix dry ingredients.
Mix dry ingredients into creamed butter mixture.
Fold stiffened egg white into batter.
Drop batter onto cookie sheets 1 inch apart. sprinkle with additional sugar or cinnamon-sugar mixture, if desired.
Bake at 375\u00b0F for 8-10 minutes.