This is from Yu Pin Yuan Iced and Hot Tangyuan, which specialises in hot sesame and peanut dumplings on shaved ice drizzled with osmanthus syrup.

There are many other choices but get these 冰火湯圓 which are Ice-Fire Dumplings.
I would say eat the balls fast, to experience that hot thin skin before it gets harder due to the ice.
Oozy peanut fillings, with fragrant osmanthus syrup.
At the more under rated Tong Hua Night Market. Worthy to try.