It is also called blue oil parcel cake. Blue oil is relative to animal oil, generally refers to peanut oil. “Parcel” refers to the shape feature of the cake, and it is made by traditional flour of east of Shandong province. The flour paste was made thin as hair line and rolled to the shape of round cake, so called parcel. Before eating, in order to show its characteristic of “rolling hair line”, we should pat the crisp “gold wire” into pieces and put into plate, then strew green and red line and white sugar on it.