Blend in sugar and evaporated milk. Mix well. Cook in microwave on Level 8 (medium-high) for 15-17 minutes or until soft ball (see note below) stage is reached. Stir mixture frequently during cooking time. Blend in chocolate morsels, marshmallw cream, vanilla and nuts. Stir until smooth. Chill until firm. Cut into 1-inch squares. Store in airtight container. NOTE: the soft ball stage is when the candy syrup, when dripped into very cold water, forms a firm ball which does not flatten on removal from water.