These are crisp on the surface with a soft and gooey centre. These are great for the holiday season as the white powdered sugar contrasts dramatically with the deep brown chocolate crevices and they look as though they are covered in snow. The recipe is from "Bakewise: The Hows and Whys of Successful Baking" by Shirley Corriher. These are Shirley's favourite cookies! She is a food scientist (as well as a cook) thus her recipes are very reliable. The dough needs to be refrigerated for a few hours or overnight. Makes 3 to 5 dozen, depending on size.