Beat dhokla batter couple of times to get air pockets into it. This will make dhokla fulfy. Do this before adding eno When the batter becomes frothy Pour the batter in a greased thali and place the thali over tope and cover it.cook it on slow flame for 15-20 min. Check the dhokha after 20 min by inserting the knife inside dhokla. If the knife comes out clean put off the flame and remove from the tope and if dhokla sticks the knife continue cooking for 5 more minutes. Allow the dish to cool.