Sambar powder is one of the main ingredient in the South Indian kitchen. Without sambar powder and rasam powder, the kitchen is incomplete. Some people use the sambar powder only for making rasam, however, while preparing rasam, we add little bit of black pepper powder and cumin powder in it.
Sambar powder is made in different ways by different people. I am presenting my way of preparing it here. This can be powdered and stored for a month. More than that I do not prefer because always fresh powder I prefer.
You can fry the ingredients and grind together with coconut for Arcachu Vitta Sambhar.