Hinge powder (Asafoetida powder) (aromatic root resin) is a powerful concentrated spice used to flavor curry and lentils.Resin-like gum is obtained from the dried sap extracted from the stems and roots and is used as a spice.The resin is grayish white when fresh, but becomes dark amber when dried. Asafoetida resin is difficult to grate and is traditionally ground between stones or with a hammer.