1/2 c. butter
3 tbsp. cocoa
1 c. walnuts, chopped
1/3 c. Coke
1 c. sm. marshmallows
1 lb. powdered sugar

In saucepan, blend butter, Coke, and cocoa. Bring to a boil. Remove from heat. Add marshmallows, nuts, and sugar. Mix well. Spread on warm cake. If too thick, add more Coke.