Rasam powder is an essential spice blend in South Indian cuisine, specifically in the preparation of rasam, a tangy and aromatic soup-like dish. Rasam is often served as a side dish with rice or enjoyed as a light soup on its own.

To prepare rasam, the rasam powder is typically dry-roasted to enhance the flavors of the spices, then ground into a fine powder. This powder is then mixed with water, tamarind pulp, tomatoes, and other seasonings to create the rasam base. The mixture is simmered until it reaches the desired consistency and flavor profile.

Rasam is known for its refreshing and tangy taste, often attributed to the combination of spices and the inclusion of tamarind. It is usually served hot and can be garnished with fresh coriander leaves for added flavor and aroma.