Keep adding water and keep mixing until you get a slightly wet crumbly mixture like this. If you hold and see it should hold its shape. It should not fall apart on its own.
Keep water for boiling in a puttu kudam/pot. Put grated coconut in the puttu kutty/puttu mould as first layer followed by puttu podi as second layer, again followed by coconut scrapings. (Just the way we do while preparing normal rice puttu).
Cook till steam starts escaping from the top of the puttu pot. Cook for about three minutes.
Once the puttu is done, serve hot with kadala curry(chickpea curry) or any other curry dish of your choice, ideally with fish curry or chicken curry.