This search does go on. Let me repeat that what VI said above is absolutely true - HP Schmaltz in N'ville and DG does fly in real NYC B&Ws every week and sells a pretty good volume. They are fairly thin (compared to the bakery-made Chicago versions shown in cross-section above), but definitely cake, dense with a nice chocolate and vanilla frosting. Next time I go, I will get the name of the NY supplier.
I think the confusion about B&W's is because they look exactly like a big, frosted sugar cookie, and it is only when you take a bite that you discover it is a completely different animal. I suppose making one is a bit of a challenge to work out, too, since people generally are not baking slices of cake that are 1/4 inch thick, and 4 inches in diameter. Maybe Ann can speak to how you even do that.
Schmaltz does wrap their cookies in cellophane, but I am pretty sure they are not produced or handled the same way as Daisy's - an apt comparison might be between the individually wrapped brownie at your local baker, versus the wrapped and labeled brownie at the cash register at a convenience store. The wrapping is a useful indicator, sure, but there are other equally important signs of quality, or lack thereof. (I do, however, believe that one should only buy a sandwich wrapped in cellophane or any form of plastic and waiting in a cooler in the most dire of circumstances).
Anyway, Schmaltz has very good and authentic B&Ws.
d
Feeling (south) loopy