The popular Southeast Asian zèng cake king in Muslim Street is always scoffed at by locals, and the main unpleasant words are nothing more than "not authentic", "not delicious", "deceitful tourists", etc., but its excellent geographical location, located in Xiyang Market and North Guangji Street Jiachakou This small shop does not even have a decent façade but attracts many people to wait in line for it. The reason for its popularity is that in addition to the excellent location of the store, its sweet taste also makes it quite popular.

The production method of retort cake is made by stacking the ingredients in a steamer and simmering for several hours. After the retort cake is out of the pot, the surface layer is dark red jujube paste, the bottom is dark brown cloud beans, and the bottom is the glutinous rice that has penetrated into the jujube paste. It tastes very soft and glutinous, with sticky sticky rice mixed with rich jujube paste, rich in aroma and sweetness, and the taste is like a soft version of southern jujube paste zongzi. Xi'an people will not only regard it as a satisfying snack, but also one of the breakfast options.

"Retort" is an ancient steaming cookware, which is also the origin of the name of the retort cake. Today's retorts are made of both iron and pottery, with steamed cakes made of pottery tasting the best, but iron cookware is more common. In the Shaanxi dialect, the retort is called "mirror", which leads many outsiders to think that the retort cake is the mirror cake, in fact, there is a snack snack that resembles a small round mirror in Xi'an, which is the real mirror cake.