Soak ¼ cup of Thandai masala powder in ¼ cup of warm water or milk for 15 to 20 minutes.
Whilst, in a saucepan boil 500ml of full fat whole milk .
After 20 minutes, transfer the soaked thandai masala into a mixer jar and blend to a smooth paste.
Now add this ground paste into 500 ml of boiled milk along with sugar.
Stir milk continuously and boil on a very low heat for 5 minutes.
Turn off the stove , remove the sauce pan and set aside for 10-15 minutes for flavours to steep in.
Now strain milk and store thandai in a pitcher/ jar and refrigerate.
Serve chilled Thandai , garnished with rose petals, saffron strands, slivered nuts and few drops of rose water.