These are known by many names. Here in Los Angeles, they are usually called Mexican Wedding Cookies or Cakes, but we always called them Snowballs. You have to be careful not to inhale the powdered sugar, but this light, nutty cookie is worth a little white powder up the nose. SNOWBALLS 1/2 cup butter or margarine 3 Tablespoons powdered sugar, plus more for coating the cookies 1 cup sifted all-purpose flour 1 cup finely......