Thandai is an Indian drink made with milk, nuts and spices like saffron, fennel. It's served especially during festival of Holi and is very refreshing. Thandai Traditionally associated with festivals like Mahashivratri and Holi thandai is a chilled almond-flavoured beverage and is terrific for when the tempratures soar. This recipe has featured on the show Khanakhazana. Thandai, sardai or thanday (ʈʰəɳ.ɖɑːiː) is a South Asian cold drink prepared with a mixture of almonds, fennel seeds, watermelon kernels, rose petals, pepper, poppy seeds, cardamom, saffron, milk and sugar. It is native to Indian Subcontinent. It is mainly used in summer. Milk, energised with almonds and spices, Thandai is the perfect drink to serve on special days and festive occasions like Holi and Diwali. The aroma of fennel, cardamom, pepper and saffron rise atop the dense flavour of fully boiled milk, to pamper the senses and rejuvenate the spirit.