Melt carob in double boiler. Add artificial sweetener to melted carob and stir well. You may use molds for fancy-shaped truffles or place mixture in a bowl to cool. When cool enough to form a ball, form into 1" diameter balls and roll in either instant coffee or chopped peanuts (not both). Place on waxed paper.
Place truffles in refrigerator for 20 minutes to set.