Preheat the oven to 350f or 180C. Keep a cookie tray ready with parchment paper.
Take besan (gram flour), all purpose flour, baking powder and salt and sift in a bowl.
Take another bowl and add butter + sugar in it. Beat the butter sugar mix with electric beater for about 2 minutes, till it becomes creamy.
Now add all the dry ingredients to the butter sugar mix.
Take a spoon or use hand and bring all the ingredients together in a dough. Don't knead it. Just bring it together.
Now take 1/2 tbsp amount of batter in hands and press delicately in a disc (not too flat).
Place the naan khatai 2 inches apart on cookie tray.
Bake in the oven for 12 minutes.
Take these out of the oven and let rest in tray for 2 minutes.
Now transfer them on cooling racks.
Store in air tight container, once they cool down to room temperature.