I have no idea about the origins of Kunukku, but they are nothing but deep fried left over Adai Batter. They are immensely simple to make and also an excellent use of the leftover. I had some left which was hardly enough to make Adai's for 2 ppl and made these during the heavy rains.
Since the previous week, we gorged on so much of outside food, I dint want to go fried again - instead chose to use my Paniyaram Pan/Pancake Puff pan to make these Adai Kunukkus - Yummy at the same time low in bad calories. You can alternatively drop the prepared batter in hot oil and deep fry these goodies.