You can also add crushed cardamom to the coconut jaggery mixture. The qty of jaggery can be adjusted to suit your sweetness level. If you are steaming, make sure not to crowd the steamer with adas. If you are making large qty, steam ada in batches. Also, the cooking time for ada varies depending on the thickness of adas and how much adas you've placed in the steamer. You can also use banana in the filling along with coconut and jaggery or use Chakka Varattiyathu (jackfruit preserve) as the filling.