Flour, sugar, baking soda, cocoa & salt - put all these ingredients together & blend. Add oil, vanilla & buttermilk - beat slowly & add 2 eggs - beat well. Add boiling water & mix. Bake at 375 degrees, 30 min. The batter will be very thin. This makes a very moist cake that will keep for days. Bake in either 2 cake pans or in a 13x9x2 pan.