It is important to use good quality Paagu vellam to make the pori urunadai. Crisp up the pori if it slightly old to make it fresh tasting again. The consistency of the syrup is very important to form the balls. If it is under or over cooked, we won't be able to roll it. The taste would still be good and we can serve as is, but to roll it into balls, the consistency has to be perfect. It comes by practice and could take couple of times before we master it. Roll the balls when the mixture is hot. If let to cool down, it will crumble and we won't be able to roll.