Place metal trivet in the bottom of the instant pot. Arrange 4 chicken breasts on the trivet and sprinkle with salt, pepper, and garlic powder. Pour 1 cup of chicken stock or water over chicken.u003cbr/u003ePlace lid on pot and seal. Set to HIGH pressure for 10 minutes. For fresh chicken, it will take about 10 minutes to come to pressure. Expect frozen chicken to take 12 to 15 minutes to come up to pressure. When the 10-minute cook time is up, do a quick release of the pressure.