Lu dou gao
Yudou Road, Xi'an, Shaanxi, China
About
Lu dou gao 绿豆糕 are literally green bean cakes (come in small cubes), but they're more moist than you may find elsewhere and also come with a variety of mixings (e.g. sesame). Half a Jin should be about six cubes and cost about ¥5 at a cart in the Muslim Quarter.