Heat milk in a sauce pan, once it comes to boil, simmer it and add in the thandai masala powder.
Next add in the saffron, Rose water and sugar.
Simmer for another 5 mins and switch off the flame. Allow the milk to cool completely and refrigerate for 2-3 hours. Let the flavors infuse in the milk. and then while serving sieve it once and serve by garnishing with rose petals.