Ingredients
Cake:
1 stick salted butter
1/2 cup oil
1 cup water
2 cups granulated sugar
2 cups flour
1/4 cup cocoa powder
2 eggs
1 1/2 tsp. baking soda
1/2 cup buttermilk or sour milk
1 tsp. vanilla
Frosting:
1 stick salted butter
1/2 cup buttermilk or sour milk
5 1/2 to 6 cups powdered sugar
1 tsp. vanilla
1/4 cup cocoa powder, optional
1 cup nuts, optional
Preparation
