Poria Cake, also known as Poria Sandwich Cake, is a kind of tonic traditional Han Chinese food produced in Beijing. Because the skin is as thin as paper, and the color is snow-white, very similar to the Chinese medicine of Poria flakes, so it is called "Poria Cake".1 The production system is made of Poria cream and white flour into a pancake, in the middle of which there is a honey, granulated sugar boiled to dissolve and stop the uniform candied pine nuts crushed kernels, the shape of which is like a full moon, as thin as paper, as snow-white, beautiful and sweet, with a unique flavor. Poria cake on the system of food law, as early as 800 years ago in the Southern Song Dynasty, "RuMenShiPin" in the record: "Poria four two, two white flour, water for cake, to yellow wax fried." But this wax fried cake is not delicious. In the early Qing Dynasty, some people put forward the "cake is expensive to loose, the cake is good for the thin" idea, so, then the cake is getting thinner and thinner. Because of the strong nourishing plus Cixi love to eat, so the value of a hundred times. Where to Beijing outsiders, most of them to Wangfujing to buy a few boxes to bring back to the gift of friends and relatives.