Frosting:

6 tbsp. Coke
3 tbsp. cocoa
1 stick butter
1 c. chopped nuts
1 tsp. vanilla
1 lb. powdered sugar

Combine Coke, cocoa and butter in pan. Bring to a boil. Add vanilla, nuts and enough powdered sugar to achieve proper consistency. Beat. Spread on cake while hot.

Cake:

1/2 c. buttermilk
2 tsp. baking soda

Sift sugar, flour, soda into bowl. Put in saucepan the Coke, cocoa and butter; bring to a boil. Stir into flour mixture. Add buttermilk, eggs and marshmallows.

Bake in 9 x 13 pan at 350°F for 35 minutes.