In top of a double boiler, combine milk and cocoa. Add marshmallows and cook until melted. Add caramels and butter, cook until caramels are melted. In a large mixing bowl, blend together, corn flakes, rice krispies and oat cereal. Mix the cereal and caramel mixture together. Pour into a buttered 16 x 12 x 2 inch pan. Chill overnight. Cut into squares. Author says kid will love this one! Recipe by: unknown cookbook Posted to MC-Recipe Digest V1 #925 by Mardi on Nov 26, 1997