Method:
Roast urad daal (without oil) till they turn slightly brownish and powder them.
Add the powder, butter, cumin seeds, sesame seeds and salt to rice flour and mix well.
Now add milk/water to it slowly mixing it to remove any lumps (Milk makes the chaklis crispier and tastier).
Make it into dough (like chapathi dough).
Knead the dough well on a flat board, pressing the dough to the board.
Fill the chakli press with the dough and press into chakli shape on a flat board (use a plastic paper on the board to make it easier to lift the chaklis
Heat oil in a kadai and deep fry the chaklis. Take out on a kitchen towel.

P.S : If the chaklis tend to break while making, try kneading the dough for some more time, if still it doesn’t come out well, add some more milk/water and knead again.