Last weekend, Aunt M came to town for a family event.  "Have you made the double chocolate layer cake from Epicurious?" she asked.  Why no, I hadn't.  And I'd been thinking, lately, that it was time to make a chocolate cake, and that was even before Libby commented on the recent absence of cakely chocolateness.  And, not only that, but my mother-in-law's birthday was coming up, and although my