In your mixing bowl, combine everything but the chips, and beat until blended.Place mixture onto a large piece of plastic wrap and twist to form a ball.Freeze for 1 hour until it holds its shape.Pour peanut butter and chocolate chips into a shallow dish.Unwrap ball and roll it in chips to completely cover.Place on plate, cover and freeze for several hours to firm.Serve with vanilla wafer, graham cracker sticks, etc.