Bo Lo Bao from Ping's Seafood Restaurant in Manhattan's Chinatown. Sweet and crusty on top, custard filling with chunks of pineapple on the inside, these buns are available as Dim Sum on the weekends. Usually they run out, so it helps to start asking for them the minute you sit down, that way you increase your chances of getting them before you're done eating.
Ping's Seafood Restaurant
22 Mott St., New York 10013; (nr Mosco; map) 212-602-9988