Microwave Mississippi Mud Cake
["2 sticks butter or margarine", "1/2 c. cocoa", "4 eggs", "2 c. sugar", "1 1/2 c. plain flour", "miniature marshmallows"]
["Put butter in a 3-quart Pyrex dish with cocoa.", "Microwave until butter melts; mix the two."]
["butter", "cocoa", "eggs", "sugar", "flour", "marshmallows"]