Sieve maida, baking soda, salt and cocoa powder for about 3 times. This is done to remove any lumps and to mix all the ingredients properly.

In a bowl, cream butter and sugar. Add milk and vanilla essence to it. Beat well. Now add the sieved dry ingredients into this.

Mix well using a wooden spoon. If you think that the mixture is little sticky to your hands, keep it in the fridge for some time.

Pre heat the oven in convection mode at 190 degree Celsius. Take small portion of the mixture and roll it into a ball. Make a small depression in the middle and place a chocolate chunk.

Cover it and roll it into a ball again, flatten a bit and place it on the baking tray lined with baking paper. Do the same procedure with the rest of the mixture.

Place the baking tray in the pre heated oven and bake it for 15 - 20 minutes. When you touch the cookies, it will be soft, not to worry. Take off from the oven and let it cool.

Once cooled a bit, transfer them on to a wire rack and let them cool down completely.

Serve it and store the rest for later use if anything is left :)