Makes One 13×9-inch cake
Cake ingredients:
2 cups all purpose flour
2 cups sugar
1 teaspoon baking soda
1/2 cup vegetable oil
1/2 cup (1 stick) butter
4 tablespoons unsweetened cocoa powder
1 cup Coca-Cola
1/2 cup buttermilk
2 large eggs
1 teaspoon vanilla extract
Frosting Ingredients:
1/2 cup (1 stick) butter
4 tablespoons unsweetened cocoa powder
6 tablespoons Coca-Cola
1 pound (1 box) confectioners’ sugar
1 teaspoon vanilla extract
1/2 cup chopped pecans or walnuts
Grease and flour a 13 x 9 x 2-inch cake pan. Preheat oven to 350 degrees F. Stir together the flour, sugar and baking soda in a small bowl. In a large saucepan, melt and stir together, until well blended, the vegetable oil, 1 stick butter, 4 tablespoons cocoa powder, and 1 cup Coca-Cola. Stir in the flour and sugar, mixing well. Add the buttermilk, eggs and vanilla extract. Pour batter into the prepared cake pan. Bake for 30 to 35 minutes or until the cake is set in the middle, and springs back when lightly pressed with your index finger. Cool on a rack. The cake can be frosted while still warm, if desired.
Meanwhile, prepare frosting by mixing and bringing to a slight boil, 1 stick butter, 4 tablespoons cocoa powder, and 6 tablespoons Coca-Cola. Remove from heat and immediately stir in confectioners’ sugar and 1 teaspoon vanilla until smooth. Stir in nuts. The frosting may look thin, but it will set up when cooled. Immediately pour frosting on cake, and quickly spread the frosting with a spatula or knife. Allow cake to cool for several hours before serving.