The crust of an egg tart is the cake crust on the surface. Egg tart skin is rich in fat, which can maintain body temperature and protect internal organs. It can also provide essential fatty acids, promote the absorption of these fat-soluble vitamins and increase satiety.
The fat in egg tart skin contains a lot of phospholipids, including egg yolk protein, lecithin, glycerol, sterols, cholesterol and so on.