Mix in large mixer bowl:

2 c. sugar
2 c. flour
1 tsp. baking soda

In saucepan:

1 stick butter
3 tbsp. cocoa
1/2 c. Crisco
1 c. coke
1 1/2 c. mini marshmallows

Bring to boil, cool, pour over dry mix. Add:

2 eggs
1/2 c. buttermilk

Mix well, pour into well greased 9 x 13 pan. Bake at 300 to 325 degrees about 40 to 50 minutes.

ICING:

1 stick butter
3 tbsp. cocoa
6 tbsp. buttermilk

Bring to boil. Remove from heat add 1 box powdered sugar, 1 teaspoon vanilla, 1 cup pecans. Pour over hot cake.