Sieve all the dry ingredients and keep it ready. Dry Ingredients are wheat flour, millet flour, baking powder and cerelac.
Cream butter and brown sugar until it is pale and smooth. .Add vanilla essence to the butter and mix well. Fold in the dry ingredients along with roasted rava/sooji into butter mixture little at a time.
Gather everything with hands without giving much pressure into a flat round of even thickness. Wrap them in a cling wrap and refrigerate for 10 min.
Take out the dough and flatten gently to a 1/2 " even thickness round. Cut them with cookie cutter to a shape desired. combine all leftovers, spread again and repeat the process.
Arrange them in cookie bake tray. Prick the cookies with fork gently so that it does not fluff up. Bake in a preheated oven at 180 degree Celsius for 15 min.
Transfer them to a wire rack carefully with a spatula and let it cool completely. Store it in air tight container