It is not Karak, in Hindi it is kadak means Strong. Very easy to make in few minutes in your home. Take 25% milk and 75% water in a tea cup in a boiling pot. Heat it till the milk boils. Add 1 or 2 teaspoon of sugar and then add 1 and half teaspoon of dust tea in the boiling milk. Boil again for 30 seconds. For extra flavour add cardamom powder if you wish. Filter it. Your Karak/Kadak or strong tea is ready.