We tried the Phulka the way northies do. It puffed up beautifully. Make chapati dough the way you usually do
wheat flour/pillsbury atta - 1 cup
water - a little more than 3/4 cup
salt to taste.
Make the dough and set aside for 15 mins.
Heat the tava and also keep the other burner on high flame. In case of electric burners, use a wire rack.
Roll the dough into round flat chapatis and put it on the tava. Turn it around after a few minutes. Later transfer the chapati to the other flame or rack. It will puff up beautifully. Use tongs to remove from flame. pour a little butter or ghee on top when still hot.
You will find lot of videos online on phulka making. Sorry couldnt help you with a video as we just moved to another place and things are still in cartons.