------------------------------------BASE------------------------------------
    1/2 c  Margarine

      1 oz Unsweetened Chocolate

      1 c  Sugar

      1 c  Flour

      1 ts Baking Powder

      1 ts Vanilla

      2    Eggs

    1/2 c  Chopped Nuts (Opt)

----------------------------------FILLING----------------------------------
      6 oz Cream Cheese

    1/2 c  Sugar

      2 tb Flour

    1/4 c  Margarine, softened

      1    Egg

      1 ts Vanilla

      6 oz Semi-Sweet Chocolate Chips

      2 c  Mini-Marshmellows

----------------------------------FROSTING----------------------------------
    1/4 c  Margarine

      1 oz Unsweetened Chocolate

    1/4 c  Milk

      1 lb Powdered Sugar

      1 ts Vanilla

      2 oz Cream Cheese

  Preheat oven to 350oF.
  *** Base ***
  Grease and flour a 9x13 pan. In a large pan, melt the margarine and
  chocolate. Add remaining ingredients and mix well. Spread in the pan.
  *** Filling ***
  In a small bowl combine the cream cheese with remaining ingredients except
  for the chips. Blend until smooth and fluffy. Spread over chocolate mixture
  and sprinkle with chips. Bake 25-35 minutes and test with a toothpick.
  Remove, sprinkle with marshmellows and bake 2 minutes more.
  *** Frosting ***
  In a small pan, melt the margarine, chocolate and milk. Beat in cream
  cheese and powdered sugar with an electric mixer until smooth. Immediately
  pour over marshmellow layer and swirl together.
  Cut into squares.
  Source: "The Yankee Kitchen" 04-01-93 (#2) [Maureen]