Mix well in large bowl:

2 c. unsifted flour
2 c. sugar
3 tbsp. cocoa
1/2 tsp. salt

Beat together:

1/2 c. buttermilk
2 eggs
1 tsp. vanilla
1 tsp. soda

Heat to boiling:

2 sticks butter
1 c. coco-cola

Pour coke mixture over flour mixture. Add buttermilk mixture and mix well. Add 1 1/2 cups miniature marshmallows.

Bake in a greased and floured 9 x 13 pan at 350 degrees for about 30 minutes or until shrinks away from sides of pan. While still warm, pour frosting over and smooth.

FROSTING:

1/2 c. butter
1/3 c. Coco-cola

Heat until butter melts. Pour over a 1 lb. box powdered sugar and 3 tablespoons cocoa. Mix well, add 1 cups chopped nuts. Pour over warm cake.