Instructions: Preheat oven to 350. In a bowl, sift sugar and flour, add marshmallows. In a sauce pan mix butter, oil, cocoa powder and Coca-Cola. Bring to a boil and pour over dry ingredients; blend well. Dissolve baking soda in buttermilk just before adding to batter along with eggs and vanilla extract. Mixing well, pour into a greased 9x13 inch pan and bake 35-45 minutes. Remove from oven and frost immediately.

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