Soak bamboo tubes in water one hour prior to cooking to prevent them from burning while cooking.
Wash and clean the banana leaves, then cut and roll them to fit the length of the bamboo tubes.
Mix rice flour with slowly poured boiled water to make a smooth batter of medium consistency.
Add grated coconut, then jaggery, and salt, mixing well after each addition.
Fill the bamboo tubes slowly with the batter, about 3/4th of their height.
Close the open end of the tubes with banana leaves or straws.
Place the bamboo tubes over flames, rotating them to ensure even cooking.
Cook for about 30-40 minutes until the bamboo is burnt and the inside is cooked.
Allow the bamboo tubes to cool down before slicing them vertically to remove the "pithas" (cakes).
Serve Sunga Pitha with Assam red tea, bamboo curd, or cream.