First rinse the raw rice twice, and soak it in water for 1 hour. Drain water completely.
Then spread the raw rice in a soft towel and allow it to dry say for 30-45 mins. It will be slightly moist only. When you touch and see there should be some rice sticking on the hand. This is the correct stage, now transfer this to a mixer.
Grind it to a fine powder in a mixie in batches. Then sieve it. If you find small balls break and sieve it.
Sieve until you get rava like mixture. Add it to the next flour batch and grind it again.
Now take sieved rice flour, jaggery and cardamom in a mixer and pulse it once or twice not more than that....this is to ensure even mixing. Transfer to mixng bowl and leave it aside for 10 mins for the jaggery to slightly leave water.
When you press with your hands it will hold its shape. Start kneading, the moisture in your hands and the melted jaggery will give a soft smooth dough.
Add gingelly oil at this stage and mix well. Roll it like a ball and transfer it to banana leaf. Using a tumbler slightly press to get a dent in the middle. Add ghee in the dent and lit the lamp as shown and offer to god as neiveidhyam.
Soft maa vilaku ready! Serve it along with coconut pieces, tastes yum!!