|Put cold milk and gelatin into blender, add hot milk. Process at stir until gelatin is dissolved.
Push liquefy button, then add chocolate chips. Blend until chips are dissolved. Add marshmallows one at a time. When marshmallows are liquefied, add vanilla extract. Pour into a bowl and chill until firm. Return to blender, add the cream, cover and whip until thick and fluffy. Pour at once into 1-quart freezer container and freeze until firm.