01 - Combine chicken pieces with all marinade ingredients in a large bowl. Mix thoroughly to coat each piece evenly. Cover and refrigerate for at least 1 hour, or overnight for maximum flavor infusion.
02 - Set Instant Pot to Sauté mode. Melt 2 tbsp butter, then add diced onions, minced garlic, and ginger paste. Cook until onions become translucent and softened, approximately 3-4 minutes.
03 - Pour in tomato puree and add ground cumin, smoked paprika, ground coriander, and cayenne pepper. Stir continuously and cook for 2 minutes to develop spice flavors.
04 - Add marinated chicken along with all remaining marinade into the pot. Stir thoroughly to distribute chicken evenly throughout the spiced tomato base.
05 - Secure the lid and set steam release valve to sealing position. Select Manual/Pressure Cook on High for 8 minutes.
06 - Allow natural pressure release for 10 minutes once cooking completes. Then carefully quick-release any remaining pressure before opening the lid.
07 - Stir in heavy cream and remaining 2 tbsp butter. Switch to Sauté mode and simmer for 2-3 minutes, stirring constantly until sauce achieves rich, creamy consistency. Adjust salt to taste.
08 - Transfer to serving bowls and garnish generously with chopped fresh cilantro. Pair with steamed basmati rice or warm naan bread.