1 cup coca cola
1/2 cup vegetable oil
1/2 cup (1 stick) salted butter
3 heaping-ish Tablespoons dark cocoa powder
2 cups granulated sugar
2 cups all purpose flour
2 large eggs
1/2 cup buttermilk
1 teaspoon baking soda
1 teaspoon vanilla extract
Frosting:
1 stick salted butter
3 tablespoons dark cocoa powder
6 tablespoons milk
1 teaspoon vanilla extract
4 cups powdered sugar
Preheat oven to 350. Butter and flour a 9×13 pan and set aside.
In the large bowl of a mixer, stir together sugar and flour and set aside.
In a saucepan, bring cola, oil, butter and cocoa to a boil. Pour into the flour mixture and beat on medium low for about a minute. Add eggs, buttermilk, baking soda and vanilla and beat on medium for a minute more. Spread batter into prepared pan and bake for about 30 minutes or until a toothpick inserted in the center comes out clean. Immediately upon removing cake from oven, prepare frosting.
In a saucepan over medium heat, bring butter, cocoa powder and milk to JUST boiling. Remove from heat and whisk in powdered sugar and vanilla. Pour over cake and quickly spread. Let cake cool to room temperature, then cover and refrigerate until serving.
