1-The dough should be stiff like pooris other wise you will not get crisp mathris.
2-Don’t fry them on high heat otherwise they may become golden from out side but remain uncooked from inside and become soft after some time.
3-You can make these with just salt,cumin and carom seed,if you don’t want to add all the spices listed.
4- For a easier version-roll the dough into a big medium thick chapati and cut with a round or any shape or size of cookie cutter .
5-You can also bake them on 180 C -350 F for approx 20 minutes if you want to avoid deep frying.