Soak all the spices and nuts for 2 hours in water.
Make thick paste of these spices.
Now mix sugar and water in a vessel and cook it on medium flame for 10 minutes.
Add the paste of the spices in this sugar syrup and cook for 5 minutes. We need honey like consistency of it.
Finally add saffron, green cardamom powder and rosewater in it and mix it well.
Your delicious thandai is ready.
Then fill it in a clean and dry bottle and store it in fridge. You can use it for 1 month without adding any preservative.
Pour 4 tea spoon (or as per taste) thandai in a glass and add a glass of milk to serve it. You can also add few ice cubes to serve it chilled.
Tips:If you will not store it in fridge, then it 3 days. So either keep it in fridge or add food preservative in it.