Combine cake ingredients and beat in mixer for 4 minutes. This creates a very satiny, thick batter. Spread into a 12×17 jelly roll pan. Bake at 350° for 10 minutes.
Combine crumb topping ingredients until it has the consistency of wet sand.
Crumble over partially cooked cake. Return cake to oven for 10-15 minutes more (toothpick should come out clean if not return to oven).
Optional: Cool and sprinkle with confectioner sugar.