Coca Cola Cake

I was going to a Fourth of July celebration and they have a dessert contest.  I remembered sometime in my past having a Coke cake and thought, "What's more American than that?"  It was delicious!  Unfortunately, it didn't place. 

Coca Cola Cake

http://www.squidoo.com/coca-cola-chocolate-cake

Coca Cola Chocolate Cake:
2 cups sugar
2 cups all-purpose flour
1 1/2 cups small marshmallows
1/2 cup butter or margarine
1/2 cup vegetable oil
3 tablespoons cocoa
1 cup Coca-Cola
1 teaspoon baking soda
1/2 cup buttermilk
2 eggs
1 teaspoon vanilla extract

Frosting:
1/2 cup butter
3 tablespoons cocoa
6 tablespoons Coca-Cola
1 box (16 ounces) confectioners' sugar
1 teaspoon vanilla extract
1 cup chopped pecans

Preheat oven to 350 degrees. In a bowl, sift sugar and flour. Add marsh-mallows. In saucepan, mix butter, oil cocoa 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 well-greased 9-by-13-inch pan and bake 35 to 45 minutes. Remove from oven and frost immediately.

To make frosting, combine butter, cocoa and Coca-Cola in a saucepan. Bring to a boil and pour over confectioners' sugar, blending well. Add vanilla extract and pecans. Spread over hot cake. When cool, cut into squares and serve.