Heat oil in a kadai on a medium heat for deep frying. While the oil heats prepare the dough to make murukku. Mix together flours, salt and butter in a bowl. Add water little by little as needed and make a smooth non sticky dough. Grease the murukku maker and fix the round wholes plate. Fill the mould with the dough. Check if the oil is hot enough.
Preparation for murukulu or murukku You can use urad dal or roasted gram for this recipe. If using urad dal, dry roast 4 tbsps urad dal on a medium heat until lightly golden. Cool and make a fine powder. Use only 4 tbsp flour from this. Grease the murukku mould with little oil.
DO NOT add more oil in dough than required, otherwise the murukku will disintegrate in oil . If murukku breaks while you press, then sprinkle little more water to make it smoother dough. Keep the dough always covered to avoid drying.
Do give it a shot by replacing rice flour partially with ragi in your murukku recipe, it turns out crispy. Just like kambu murukku, this too was a surprise for me to turn out good than I expected. Ragi murukku, finger millet flour murukku turns out crispy, turns delicious too. Full quick video recipe with step by step pictures.