First, start by chopping the celery and onion. Chop and mince the garlic cloves.
Season the chicken breast with a little bit of salt and pepper if desired.
Set the function on the instant pot to saute and add the butter. Remove the trivet as you will not be using it for this recipe. Once the butter has melted, add in the celery, onion, minced garlic and flour. Saute for just 1-2 minutes until fragrant. Add the chicken breast in and mix together just to combine.
Pour in the chicken or turkey broth and mix. Cancel the saute function and close the lid. Cook on high pressure for 12 minutes with a 10 minute natural release.
Release any remaining pressure and open the lid.
Remove the chicken breasts and transfer to a plate. Use 2 forks to shred the chicken then transfer back to the instant pot.
Cut the softened cream cheese into smaller pieces.
Turn the saute function on again and add in the buffalo sauce, cream cheese, cheddar cheese and ranch seasoning. Mix together to combine and allow the cheeses time to melt. This took about 5-7 minutes. Turn off the saute function and serve with crumbled bleu cheese and fresh parsley if desired.