Pour flour into the sifter, add to it the cocoa, soda, sugar and salt; sift this into a greased square pan, about 9x9x2 inches. Now make 3 holes in the dry mixture. Into one, pour the oil, into the next, the vinegar; into the last, the vanilla. Now pour the cold water over it all. You'll feel as if you are making a mud pies, but beat with a spoon until it's nearly smoth and you can't see the flour.
Bake at 350 degrees for 25 minutes. Then take the cake out and let is cool slightly. Do not turn the oven off !
Sugar Topping: Mix all topping ingredients together in a bowl. Then spread on cake and put back into the oven till the frosting bubbles on the whole top of the cake.