Why is the surface of the brain flower that must be ordered when eating hot pot uneven?

Because there are many tiny capillaries on the surface of pig's scalp or trotters, a network structure is formed. The brain flower that must be ordered to eat hot pot is pig scalp or pig's trotters tendon, and in some places it is cow scalp or beef tendon. The reason why the surface of brain flower is uneven is that there are many tiny capillaries on the surface of pig scalp or pig tendon, forming a network structure. During the cooking process, collagen in pig's scalp or trotters will gradually dissolve, and these tiny capillaries will also emerge on the surface, forming uneven effects. The unevenness of the surface not only increases the taste and chewiness of the brain flower, but also allows the dip to better adhere to the surface and improve the flavor and taste.