Fa gao

Fa gao , also called fat pan (發粄) by the Hakka, prosperity cake, fortune cake, Cantonese sponge cake, is a Chinese steamed, cupcake-like pastry. Because it is often characterized by a split top when cooked, it is often referred as Chinese smiling steamed cake or blooming flowers. It is commonly consumed on the Chinese new year. It is also eaten on other festivals, wedding, and funerals by the Hakka people. The name of cake, fagao, is a homonym for "cake which expands" and "prosperity cake" as "fa" means both "prosperity" and "expand" and "gao" means "cake". The Hakka call the "top split" of the fa ban "xiao", which means smiling; which resembles a sign of a coming fortune; therefore, the bigger the "top split", the better.

Source: Wikipedia