In a wok add oil. Do not overfill the wok. Just add halfway or enough for frying.
Oil for frying
Heat the oil on a medium stove.
Check if the oil is hot by dropping a small portion, if it comes up instantly it is hot enough.
Once hot, slide one puri in the hot oil upside down. (The rolled side down).
Wait for a few seconds.
Once the puri starts coming up, gently tap it with the help of your spoon.
This will help puff the puri.
During this time, the puri would have been cooked on the bottom side.
Once the puri is puffed up, flip it and cook it on the other side.
Cook until it is golden brown.
Take out the puri, by removing excess oil.
Remove it in a colander or tissue paper.
Enjoy.