Flavored Fat / Oil Layer

Rogan rising to the top of a pot means the bhunna process is complete and masalas are properly cooked — it is the visual checkpoint every Pakistani cook looks for before declaring a curry done. In Kashmiri and northern Pakistani cooking, rogan is specifically the fat rendered from sheep's tail fat (dumba) that gives roghan josh its name and silky texture. Restaurants often add extra oil deliberately to make dishes look more finished; home cooks consider excessive rogan a sign of an oily restaurant cook.