Add ¾ cup milk to a large bowl.
Add the thandai powder and sugar.
Churn using an immersion blender till the powder distributes well.
Add the whipping cream and mix with a spatula.
Chill the base for an hour to 90 minutes.
Mix saffron with the remaining ¼ cup lukewarm milk and set aside.
In a chilled ice cream maker bowl add the base and saffron milk.
Start churning the ice cream.
Once the ice cream begins to form i.e. you see it thickening well add dried rose petals and nuts.
Churn for another 3 minutes to distribute the nuts and stop the machine.
You can enjoy it right away as a soft serve ice cream or chill in a freezer safe container with some added toppings.