Mathri is a Rajasthani

Rajasthani people

Rajasthani people are the native inhabitants of Rajasthan region of India. They form an ethnic group which is a result of assimilation of Scytho-Dravidian, Aryo-Dravidian, Indo-Aryan, Indo-Scythian, Indo-Greeks, Indo-Iranians and Austro-Asiatic ancestries...

 snack

Snack

A snack is a small portion of food eaten between meals. The food might be snack food—items like potato chips or baby carrots—but could also simply be a smaller amount of any food item.-Snacks and health:...

. It is a kind of flaky biscuits from north-west region of India. This snack is influenced by the typical need to have preserved food for days and are stored in big jars.

It is served with mango, chilli or lemon pickle along with tea

Masala chai

Masala chai is a beverage from the Indian subcontinent made by brewing tea with a mixture of aromatic Indian spices and herbs.-Terminology:-Plain chai:...

. They are also served at marriages

Indian wedding

South Asian weddings are very bright events, filled with ritual and celebration, that continue for several days. They are generally not small affairs, with anywhere between 100 to 10,000 people attending. Often, it is possible that many of the attendees are unknown to the bride and groom themselves...

 and poojas. Masala Mathri is a variant of Mathri with spices added to make it more crispy.

It is one of the most popular snacks in North India

North India

North India, known natively as Uttar Bhārat or Shumālī Hindustān , is a loosely defined region in the northern part of India. The exact meaning of the term varies by usage...

, and is part of most marriage cooking or religious occasions like Karva Chauth and even as tea-time snack.