Bakpia is a food made from a mixture of green beans with sugar, wrapped in flour, then baked. Bakpia term itself is derived from the Hokkien dialect (Hanzi: 肉餅), from the word “bath” which means meat and “pia” which means cake, which literally means bread containing meat. In some areas in Indonesia, the food tasted legit is known as the pia pia or cake.
Bakpia including one of the popular dishes from China or Chinese families. Bakpia well-known one of them comes from the Pathok (Pathuk), Yogyakarta. Given the Yogyakarta people are pretty much the religion of Islam, in its development, the contents of the original bakpia pork was changed to green beans. Then the flavors of bakpia developed into chocolate, cheese, kumbu green, and black kumbu.
source : wikipedia.org & bakpiapathok25.com