In a bowl mix together maida, custard powder, baking powder and salt. Set aside.
In another bowl, add butter and powdered sugar along with vanilla and beat until creamy.
Add in the flour mix and gently mix to form a smooth dough.
Place the dough between two parchment papers and roll into a 1/4" thick disc.
Using a cookie cutter, cut them into rounds.
Gently transfer them to a parchment lined tray.
Knead the remaining dough and again roll it and cut it into rounds.
Once all the dough is used up, place the tray in fridge for 30 - 45 minutes.
Preheat oven to 175°C.
Bake the cookies for 10 minutes.
Remove them and allow them to cool on the tray itself.
Store them in airtight box and serve along with a cup of coffee.