Kai Murukku
From Wikipedia - Murukku, known as Chakli in Marathi and Kannada and Chakri in Gujarati, is a savoury snack popular in India. Murukku is typically made from a mixture of urad and rice flour, salt, and flavourings such as chili, asafoetida, ajawain, or cumin.
This variety is known as "Kai Murukku". Found this one at a traditional Tamil (Iyer) weeding ceremony.