Deep fry the onion julinnes, remove and keep it aside.
In a pressure Cooker, add butter, when it starts melting, add all the whole spices, saute well and then add chopped green chilies. Now add chicken along with the marinade. Simmer and cook for 5 mins.
Spread the chicken pieces properly, then on top, add the fried onions, next add the par boiled rice, sprinkle one ladleful milk. Do not stir or mix the layers. Now cover with lid and pressure cook for 1 whistle.
Switch off and place the cooker over a tawa and dum cook for 15 min.
Let the pressure fall down, transfer to a bowl, and serve.