Add the chicken stock to the Instant Pot insert. Place the rack that came with the appliance or a steam rack into the insert.
Season the turkey breast with salt and pepper on both sides. Place onto the steam rack in the insert. Spread the butter over the turkey, then sprinkle the herb seasoning blend directly onto the turkey breast, covering and coating it well.
Close the lid and set to Sealing.
Cook on High Pressure, Manual Mode for 8 to 10 minutes. For thinner breast fillets, cook for 8 minutes and for thicker fillets, cook for 10 minutes.
Quick release the pressure and remove the turkey breast and slice to serve.
Optional: Ladle out the juices from the base and skim off the fat and then whisk in some flour or cornstarch to make a gravy.
Serve Instant Pot Herbed Turkey Breast with favorite holiday side dishes.