Mix everything except milk and marshmallows. Set aside. Heat milk and marshmallows until melted. Pour over the first mixture and mix well. With buttered hands press mixture into a 13 X 9 pan lined with wax paper. Refrigerate. Turn out on clean cutting board and pull wax paper off. Cut into bars when ready to serve. Top with (optional) spoon of whipped cream or sour cream. Good either way.