1 c. water
2 sticks butter
4 tbsp. cocoa

2 c. all-purpose flour
2 c. sugar
1/2 c. buttermilk
1 tsp. baking soda

Cake mixture will be very thin. Bake in sheet pan at 350 degrees until done. To check, stick toothpick in cake. When toothpick comes out clean, cake is done.

ICING:

6 tbsp. cocoa
6 tbsp. buttermilk
1 stick butter

1 box powdered sugar
1 c. pecans
1 tsp. vanilla

Pour icing over hot cake with marshmallows on top.