Poria Sandwich Cake is a Qing Dynasty palace pastry, Cixi Imperial Cuisine, processed from Poria, sesame, honey, osmanthus, peanuts, etc., as early as 800 years ago, there is a record: "Poria 4 two, white flour 2 two, water adjusted for the cake, to yellow wax fried." This wax fried cake is not good. In the early Qing Dynasty, some people put forward the idea of "the cake is more than loose, the cake is good for thin", and then the cake is getting thinner and thinner. In the Qianlong period, Shandong Kong Fantai home made cakes "thin as a cicada wing, soft and exquisite". By the middle of the Qing Dynasty, people added a sweet filling, with two cakes together, sandwiched between walnuts, pine nuts, melon seeds and other spices and honey, the name is "seal cake". Shaped like a full moon, white as snow, thin as paper, precious and sweet, unique flavor. It is also a good gift for friends and relatives.