In small bowl mix one 7 1/2-oz. jar Marshmallow Fluff with 1/4 tsp. vanilla. Gradually stir in enough confectioners’ sugar (about 2 c.) until stiff enough to knead. Knead until mixture loses stickiness, adding more confectioners’ sugar if necessary. Put fondant in a bowl or jar; place a damp cloth over it and cover tightly. Store in a cool place 2-3 days before using . Makes 31/2 cups.
