Put chai ko is a popular snack in Hong Kong. The pudding cake is palm size and is sweet in taste. It is soft, but can hold its molded shape outside of a bowl. The cake is made from different forms of steamed sugar and select ingredients.[clarification needed]
The snack is also known by a number of English names, including Put chai pudding, Earthen bowl cake, Bootjaigo, Red bean pudding, Bood chai ko and the more direct but unofficial translation of Sticky rice pudding.
The pudding is made like other traditional Cantonese steam cakes. It is said to have originated in the Chinese county of Taishan, which is 140 km (87 mi) west of Hong Kong. The pudding reached its popularity peak in the early to mid-1980s when hawkers sold it all over the streets in their push carts. At the time, there were only a small handful of flavors. One of the dish's cultural trademarks is that it is served in a porcelain bowl or an aluminium cup. The snack is still available today in select Chinese pastry or snack shops, or from street hawkers. The pudding can also be served like an ice pop, held up by two bamboo sticks.