Anupy's Butter Chicken from the soon-to-be-published cookbook Instant Pot Indian.
We have had a lot of butter chicken from restaurants and recipes made at home. This recipe was spicer than the butter chicken we have had in the past (I added the maximum amount of cayenne and serrano chiles) but was determined by the entire family to be THE BEST butter chicken ever.
All of Anupy Singla's recipes are fantastic but this one is by far the best and it cooks quickly in the Instant Pot. Check the link in her bio for this and all her other fantastic recipes.