Take jaggery in a kadai. Add in water and heat it so it is melted. Strain them
Add it back to the kadai and boil it..The mix will get dark and thick. Cook till the syrup reaches one string consistency (if you dip the spoon into the syrup and remove, the last drop falling from the spoon forms a string) or soft ball stage (if you drop few drops of syrup in a plate of cold water, you will be able to gather them together and form a soft balls. It shouldn't be sticky or it shouldn't turn hard.
Now add in the puffed rice and mix well.
Immediately grease your hand with ghee. take a healthy portion of the pori mix and press firmly and shape it into balls. Pack the balls tightly.
Done..Let it cool down for 15 mins and then enjoy.
Video
Notes
The syrup stage is really important in making the balls correctly. if you cook the syrup too much, it will crystalize and you wont be able to shape the balls.
You have to use dark coloured jaggery for this.
If you have cooked the jaggery longer and not able to make balls, dont panic, add all the mix to the kadai and stir for few minutes, the jaggery will coat the pori and you will have sweet pori. See my third image from top.
You have to make this when the mix is hot, or you will not be able to make balls out of it.
If the mix cools down, put it back on stove and heat it for 30 sec till the jaggery melts again and make balls from it.