01 - Combine chicken pieces with all marinade ingredients in a large bowl. Mix thoroughly to coat, cover, and refrigerate for at least 1 hour or 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 and translucent, 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 meld flavors and prevent scorching.
04 - Add marinated chicken pieces along with all remaining marinade to the pot. Stir thoroughly to combine with the spiced tomato base.
05 - Secure lid and set steam release valve to sealing position. Cook on Manual/Pressure Cook High for 8 minutes.
06 - Allow pressure to release naturally for 10 minutes, then carefully quick-release any remaining pressure. Open lid away from you to avoid steam burns.
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, generously garnished with chopped fresh cilantro. Pair with basmati rice or warm naan bread for complete meal.