Rinse 1 cup of urad dal and moong dal, soak both lentils overnight or 7-8 hours.
After that, add ½ cup of water in the bowl of dals, grind it with the help of grinder or mixer and make a thick batter.
Now, add ½ tbsp of salt in the batter.
Then, beat or whisk it until you can see fluff in the batter or the quantity of batter little more than before that means batter is now ready for deep frying.
Heat oil in the pan.
You can also add a small drop of batter in oil for checking the right temperature of deep frying.
After that drop batter with the help of your hands in the hot oil. (The size of Bhalla is depended on you ).
When it turns crispy and little golden then flip the other side of Bhalla.
When it's done then drain it in the separate plate.
Fry all Bhalla in the same way.
Then soaked them in the water for 9-10 minutes.
Gently, squeeze all of them.