Mix and set aside:

2 c. sifted flour
2 c. sugar

Mix and bring to a boil:

1 c. Coca Cola
1 c. butter
3 tbsp. cocoa

Add to the dry mixture. Mix in a bowl and beat well:

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

Add to mixture. Include:

1 tsp. vanilla
1 c. marshmallows

Pour this very thin mixture in a 9x12 inch pan and bake at 350 degrees for 30 minutes.

ICING:

Melt 1 stick of butter with 3 tablespoons of dry cocoa and 6 tablespoons of Coca Cola. Bring to a boil. Add 1 box of confectioners' sugar, 1 teaspoon of vanilla and 1 cup pecans. Ice while hot.