Grease jelly roll sheet. Spoon mixture around and bake 25 min. at 350, then immediately add marshmallows and pop back in the oven for 3-4 min. Cool one hour then frost with 1 C butter, 2/3 C cocoa, 2/3 C evaporated milk (5-oz. can) and 4C powdered sugar (1 pound bag). Set overnight before cutting in squares (like we ever wait this long to eat them.
|