Add in carrots, celery, onion and seasonings and stir to combine. Cook for 2 minutes.
Add in diced chicken and cook for an additional 1-3 minutes, chicken will just begin to brown but not cook through.
Add in chicken broth.
Dumplings
Mix together milk, baking mix and sour cream. Batter will be wet and sticky.
Spoon dumplings onto top of liquid in Instant Pot
Put on the lid and set to manual, high pressure for 3 minutes.
Do a quick release.
Sprinkle dumplings with fresh or dried parsley.
Spoon dumpling and liquid into a bowl. Enjoy!
Notes
The broth will still be somewhat thin but as you dish up the chicken and dumplings and start cutting into the dumpling, it will begin to thicken the broth and you will have a nice thick broth there is no need for any kind of thickening agent other than the dumpling itself.
When you open the Instant Pot the dumplings are going to look wet and even a little raw, that's o.k. As they sit for a minute the air will dry out the top. I like to garnish with some dried or fresh parsley.