Burning the surface is a cooking technique used to create a flavorful and crispy texture. The two main methods of burning the surface are searing and charring. Searing is a cooking technique that involves quickly cooking food at a high temperature, usually in a pan or skillet. Charring is a cooking technique that involves exposing food to direct heat, usually over an open flame. Both techniques can be used to burn the surface of food, creating a flavorful and crispy texture.