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 absorption.
02 - Set Instant Pot to Sauté mode. Add 2 tablespoons 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 prevent sticking and allow spices to bloom.
04 - Add marinated chicken pieces along with all remaining marinade liquid to the Instant Pot. Stir thoroughly to combine chicken with the spiced tomato sauce base.
05 - Secure the lid and ensure steam valve is sealed. Set Instant Pot to Manual or Pressure Cook on High for 8 minutes. The chicken will become tender during this pressurized cooking phase.
06 - When cooking cycle completes, allow natural pressure release for 10 minutes. Afterward, carefully switch to quick release to depressurize any remaining steam before opening the lid.
07 - Stir in heavy cream and remaining 2 tablespoons butter. Switch back to Sauté mode and simmer for 2-3 minutes, stirring continuously until sauce achieves a rich, velvety consistency. Season with additional salt as needed.
08 - Serve immediately while hot, generously garnished with freshly chopped cilantro. Accompany with steamed basmati rice or warm naan bread for complete meal.