- Grind the cooked potato with butter and enough water as fine paste, take the rice flour, cumin seeds, asafoetida powder, and salt in a large bowl, gradually add the ground paste, water and knead as soft and smooth dough. Heat enough oil for Deep Frying. Gently drop enough dough in a murukku press with three holes nozzle and squeeze out the dough in a greased plate, drop gently to the hot oil and cook until the bubbles gets off from the oil, drain the murukkus in paper towel and arrange in air tight container.