To make punukkulu, take 2 cups of idli or dosa batter in a bowl.
Add cumin seeds, chopped onion, green chillies, coriander leaves, curry leaves and mix well.
Mix in salt and baking soda. The batter should neither be too thick or too runny.
Heat oil for deep frying.
Take a spoonful of batter and drop it into the hot oil.
Fry over medium flame, flipping them over every now and then for even browning.
Once they turn a golden brown, remove them with a slotted spoon onto absorbent paper.
Serve crunchy Punukkulu hot with chutney or ketchup.