Biryani can be made as much or as little spicy as you need it to be. A tip to reduce heat in the biryani is to use Kashmiri red chili powder in the chicken marinade. This spice powder is low on heat, yet gives a vibrant red color to the meat. Spice powders are added to the marinade and whole spices are added while cooking the rice. These add flavor to the biryani but do not increase the heat or potency of the biryani.