Season 1 pound boneless skinless chicken breasts with ½ teaspoon sea salt and ½ teaspoon black pepper and set them inside the inner pot of the Instant Pot. Pour ½ cup chicken broth over the breasts and lock the lid on the IP. Be sure the pressure valve is closed (set to Sealing).
Cook on high pressure for 15 minutes. (Note: Depending on the model of IP, it can take up to 10 minutes for the Instant Pot to come to pressure before the cooking begins.)
When the cook time is complete, perform a quick release of pressure. When the pressure pin drops, remove the lid from the IP.
Use tongs to remove chicken from broth.
To shred the chicken with forks: Transfer to a cutting board. Use two forks to pull the chicken the chicken apart.
To shred the chicken in the stand mixer: Place the cooked chicken into the bowl of a stand mixer fitted with the paddle attachment. (If you don't have a stand mixer, use an electric hand mixer in a large mixing bowl.) Run the mixer on medium-high speed for about 1 minute and the meat will be perfectly shredded.
Notes
For more flavor, substitute the broth with any chicken marinade and cook it the same way.
Rather than performing a quick release of pressure, if you have time, let the pressure release naturally for 15 minutes before releasing the remaining pressure. This allows the juices to remain in the meat, which prevents it from seizing up.