Take Makhanas in a pan and dry roast them on low heat till they turn slightly golden and crisp.
Remove from the heat and let them turn cool completely.
Put them in zip lock bag and crush them coarsely using some heavy object. We have used rolling pin. If don't have ziplock bag, crush them anyway.
Take curd in a bowl and add all the ingredients mentioned in the list of ingredients i.e. milk, red chilli powder, roasted cumin seeds, garam masala, chaat masala, black salt and dry mint leaves along with crushed makhana. Whisk well.