01 - Combine all marinade ingredients in a large bowl. Add chicken pieces, mix thoroughly to coat, cover and refrigerate for minimum 1 hour, up to overnight for optimal flavor penetration.
02 - Bring water, salt, bay leaves, cardamom pods, cloves, and cinnamon to a rolling boil in a large pot. Add soaked rice and cook until 70% done, approximately 7-8 minutes. Drain thoroughly and set aside, removing whole spices if preferred.
03 - Heat butter and oil in a large skillet over medium heat. Add chopped onions and sauté until golden brown, about 5-6 minutes. Stir in ginger and garlic paste, cook for 1 minute until fragrant.
04 - Add marinated chicken to the skillet. Cook until lightly browned on all sides, 6-8 minutes. Sprinkle garam masala, cumin, paprika, and chili powder over chicken, stirring to coat evenly.
05 - Pour in crushed tomatoes and simmer for 10 minutes. Add heavy cream and sugar, season with salt to taste. Continue simmering until sauce thickens and chicken is fully cooked through, 10-15 minutes. Stir in fresh cilantro and remove from heat.
06 - In a large ovenproof Dutch oven or heavy pot, spread half the butter chicken sauce evenly across the bottom. Top with half the partially cooked rice. Drizzle with half the saffron milk, melted butter or ghee, fried onions, cilantro, and mint. Repeat layers with remaining ingredients.
07 - Cover container tightly with aluminum foil or a secure lid. Bake at 350°F for 25 minutes, alternatively cook on stovetop over very low heat for 25 minutes to allow flavors to meld.
08 - Remove from heat and let rest for 10 minutes. Gently fluff with a fork, being careful not to break the rice grains. Serve hot while aromatic and steaming.