01 - Combine chicken pieces with all marinade ingredients in a large bowl. Mix thoroughly to coat evenly, cover, and refrigerate for at least 1 hour or overnight for maximum 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 become translucent and softened, approximately 3-4 minutes.
03 - Stir in tomato puree, ground cumin, smoked paprika, ground coriander, and cayenne pepper. Cook for 2 minutes, stirring constantly to develop spice flavors and prevent scorching.
04 - Add marinated chicken along with all marinade liquid into the pot. Stir thoroughly to combine chicken with the spiced tomato base.
05 - Secure and lock the lid. Set Instant Pot to Manual/Pressure Cook on High for 8 minutes. Ensure steam release valve is set to sealed position.
06 - Allow natural pressure release for 10 minutes once cooking completes. Then carefully perform quick-release to vent any remaining pressure.
07 - Stir in heavy cream and remaining 2 tbsp butter. Switch to Sauté mode and simmer for 2-3 minutes, stirring continuously until sauce achieves rich, creamy consistency. Season with salt to taste.
08 - Serve immediately over basmati rice or with warm naan bread. Garnish generously with chopped fresh cilantro.