Sift together flour, sugar, baking ... eggs, 1/2 cup buttermilk and 1 teaspoon vanilla. Pour into a greased 9x13 inch sheet pan. Bake at 350 degrees ... a 9x13 inch cake. If only using half, ... Bake about 20 minutes.
Ingredients: 10 (buttermilk .. cocoa .. flour .. salt .. soda .. sugar ...)