Heh, the last time I devoted stomach space to XLB was February! I still haven’t made it to Dumpling Time.
For then and later 2017, Din Ding and Bing’s Dumpling top my list. Of non-standard ones, although I prefer their SJB, I-Shanghai Delight’s shrimp and pork or spicy pork are excellent (their sweet base works better with these than their standard XLB).
