Mix all the ingredients together. Flatten into the bottom of a 9 by 13 inch pan. Bake 15 minute at 350 degrees or until lightly brownn around edges. Cool.
FOR THE FILLING;.
Heat the milk in a saucepan and melt the marshmallows inches Let cool. Fold in whipped cream; spread this mixture over cooled crust.
FOR THE TOPPING:.
Dissolve the jello into hot water, and stir in frozen berries. Chill until it begins to thicken, about 30-45 minutes. Spoon carefully over marshmallow layer. Serve chilled.