Add 2 - 3 frozen chicken breasts to the inner pot of your Instant Pot. Do not use the trivet. The chicken breasts cook better when they are not all frozen together. Selecting individually frozen chicken breasts is best. Lay the chicken breasts side by side. If they are stacked on top of one another, they will take longer to cook.
Pour in one cup of chicken broth over the chicken breasts (you could use water but the chicken broth adds flavor).
Sprinkle on your favorite seasoning (I use Mrs. Dash).
Close the lid on the Instant Pot.
Point the steam release handle to sealing.
Press the pressure cook or manual button (or poultry button) then set for 12 minutes using the -/+ buttons at high pressure. If the chicken breasts are thick, you may need to increase the cook time.(See Notes)
When finished cooking, allow a 10 minute natural pressure release. When it has counted to 10 minutes, press cancel then point the steam release handle to venting to let out the remaining steam. Remove the lid once the float valve has completely dropped (meaning all the steam has been released).
Check the internal temperature of the chicken using an instant read thermometer. The temperature should be 165℉. Place the thermometer in the thickest part of the chicken breast.
If the chicken hasn't reached 165°F, continue cooking for an additional 2-3 minutes till the 165°F temperature has been reached.
Notes
If using thick chicken breasts, increase the cook time to fifteen minutes.