In a clean dry mixer jar, add almonds,cashews and pistachios.
Then add pepper corns and fennel seeds,melon seeds,cardamom,saffron,dry rose petals.
First grind it to a coarse powder.Scrap the sides and pulse it few times. Do not grind more, as the nuts may leave out oil.Transfer to a plate and let it cool down then store in a clean airtight container.
Take 1 cup chilled full fat milk.Add 2 tsp thandai masala powder to it.Add sugar.Mix well.Set aside atleast for 15mins.
Then strain,press it well with a spoon.Serve chilled with few strands of saffron.