Measure and keep all ingredients ready. Also, preheat the oven to 180 deg C for 10 minutes. Sieve the ragi flour, wheat flour, baking powder and salt together and keep it ready.
Then take the butter in a vessel. Let it come to a room temperature. Then add brown sugar to it. If using palm sugar or regular sugar grind it to a fine powder and add here. Mix well until the sugar is completely melted.
Add this butter sugar mix along with vanilla essence to the sieved dry ingredients and start to mix the dough with your hands gently until you get the soft dough consistency. Add 1 to 2 tbsp of milk if required while gathering the dough.
Once the soft dough consistency is reached, keep the cookie dough in the refrigerator for 20 mins. In the meantime, line the cookie tray with a cookie sheet/parchment paper. After 20 mins, take the cookie dough from the refrigerator and start making balls and flatten it using your palms.
Arrange the cookies, garnish with nuts if desired and bake in the preheated oven for 15-20 minutes (baking time depends on the size of the cookies and oven) at 180° C till cookies are browned at the bottom. Allow to cool in the tray for 5 minutes and serve the cookies.