For all the chocolate lovers out there, Chocolate Tāngyuán is a must-try. Add cocoa powder to the sticky rice flour to give the rice balls a rich chocolate flavor. The filling can be a combination of chocolate ganache, Nutella, or even a chocolate peanut butter mixture. Serve the Chocolate Tāngyuán in a warm chocolate sauce or alongside a scoop of chocolate ice cream for the ultimate chocolate indulgence.