Heat a wok or kadai adding urad dal(split black gram lentil) and roast them in low flame till the lentil changes color to brown and aroma wafts all around. Switch off the flame. Let it cool.
Once the lentils are cool, add in to mixer grinder and grind to fine powder. Sieve it to get fine textured powder. Transfer this roasted lentil flour and home made rice flour to a wide mixing bowl. Add cumin seeds and salt as well. Give a quick mix.
Meanwhile add fresh grated coconut in to mixer grinder adding enough water and grind to fine paste. Transfer this paste on to strainer and squeeze to extract fresh coconut milk. You can repeat grinding squeezed coconut with water and extract milk once again.
Now add this fresh coconut milk little by little to the rice and lentil flour mix in the bowl to make soft pliable dough. Knead the dough well. If the dough is thick the murukku breaks while pressing and if it is thin, then murukku may turn very soft instead of being crisp.
Make medium sized balls from the dough and insert in to murukku press. Press equal sized murukkus on small square sized paper or cloth.
Meanwhile heat a wok adding cooking oil, once oil gets heated up drop each pressed murukku in to oil and fry them till murukku turns slightly brown in color.
Using slotted ladle remove them from oil and drain on tissue. Repeat pressing and frying process with rest of the dough.
Crispy, crunchy murukku is ready with the aroma of coconut, it tastes wonderfully awesome.