Not my usual beat, but I stole it off Ace Of Spades, so its conservative bona fides must be impeccable. Besides, he's probably knocked most of the HuffPo cooties off it.
The recipe makes the cake from scratch, but if you are in a hurry or not sure of your skills in that regard, I see no reason (keep in mind that IANAC*) why you couldn't substitute an angelfood or other premix for it.
(* I Am Not A Chef. Also, it calls for a grape jelly, but I would think that raspberry or blueberry, etc. would work equally well.)