In a pan, dry roast urad dal on medium flame until golden and aromatic. Let this cool completely. Transfer this to a mixie jar or blender and blend it to smooth powder.
¼ cup Urad dal
In a large bowl, add rice flour, urad dal powder, salt, and sesame seeds and mix. Now add the butter and nicely rub it with the flour so that the butter is incorporated well with the flour.
1 cup Rice flour, ½ teaspoon Salt, adjust as needed, 1 teaspoon Sesame seeds or Til, 2 tablespoon Butter, softened
Add water little by little to form a firm, crack-free dough. The dough should be non-sticky, and at the same time, it should not be dry. Check out the video here. Water, as needed
Grease the murukku mold and the star-shaped plate with oil.
Heat oil in a pan on a medium flame for frying.
Oil for frying.
Fill the chakli mold with the dough and gently press to form a spiral shape chakli of the desired size on parchment paper (you can also use a muslin cloth or butter paper).
Check if the oil is hot. Drop a piece of dough; it should sizzle and come up slowly.
Lift the parchment paper, gently remove the chakli or murukku and slide it in hot oil, 4 to 5 chakkulis at a time, depending on the size of the pan.
Flip them after 30 seconds. Continue to flip every once in a while and cook till it becomes golden and crisp evenly.
Transfer it to a paper towel to absorb any excess oil.
Once it cools down completely, store it in an airtight container. Use as and when required.