01 - Combine chicken pieces with all marinade ingredients in a large bowl. Mix thoroughly, cover, and refrigerate for at least 1 hour or up to overnight for optimal flavor penetration.
02 - Set Instant Pot to Sauté mode. Add 2 tbsp butter and allow to melt. Add diced onions, minced garlic, and ginger paste. Sauté until onions are softened, approximately 3-4 minutes.
03 - Stir in tomato puree, ground cumin, smoked paprika, ground coriander, and cayenne pepper. Cook for 2 minutes, stirring frequently to toast the spices and prevent sticking.
04 - Add marinated chicken along with all remaining marinade to the pot. Stir thoroughly to combine with the spice base.
05 - Secure the lid and set steam release valve to sealing position. Cook on Manual/Pressure Cook High for 8 minutes.
06 - Allow natural pressure release for 10 minutes, then carefully quick-release any remaining pressure before opening the lid.
07 - Stir in heavy cream and remaining 2 tbsp butter. Simmer on Sauté mode for 2-3 minutes, stirring continuously until sauce achieves rich, creamy consistency. Adjust salt to taste.
08 - Serve immediately, garnished generously with chopped fresh cilantro. Pair with basmati rice or warm naan bread.