Preheat oven to 350 degrees.
Cream margarine, sugar, cocoa and vanilla until fluffy.
Beat in eggs, one at a time, beating well after each addition.
Add flour and salt and mix well.
Spread in greased 12 x 18 inch jelly roll pan.
Bake for 20 minutes.
Remove from oven and spread marshmallow creme on hot bars.
Combine peanut butter and chips and melt in top of double boiler.
When melted, stir in Rice Krispies until cereal is coated.
Spread cereal mixture over marshmallow layer.
Cool and cut into bars.