Buca di Beppo (Italian chain that does mostly family style dishes) has this huge brownie sundae that you usually get for free with a coupon from your birthday if you subscribe to their email spam.
I tried to eat the whole thing myself once. I might have been successful, had I not also had an eggplant parm lunch immediately prior to that. Not wanting to waste anything, I asked for a box in which to take the brownie bites I failed to finish home. Did manage to finish one another time when I took my mother to lunch and we split the sundae. (Incidentally, after we finished it she lamented that she had not taken a photo of it to send to her friends.)