Mix together rice flour, fried gram flour, chickpea flour, salt, asafetida, cumin seeds and butter.
Add water as needed and mix together to form a smooth dough.
Heat oil in a deep bottomed pan. Check if the oil is hot enough to fry murukku.
To test add small piece of dough to the hot oil. if the dough raises to the top the oil is hot enough to fry.
Grease the murukku maker and put on the star plate. Fill the mould with enough dough and press in the hot oil.
Fry evenly stirring often. When they turn golden, drain them on a kitchen tissue. Repeat the process until the dough is done.
Cool and store in an airtight jar.