Sand rack cake (Sacher cake) is the national treasure of Austria and the signature dessert of Shajia hotel. It originated from the chocolate filling developed by a prince's chef Franz. Sacher in 1832 and is deeply sought after by the royal family. The exclusive secret recipe of Shajia cake is still a controversial dessert lawsuit. Once a dessert shop wanted to buy all the original recipes of Shajia family members with a lot of money, but it was rejected To the rejection of the sand shelf.