It depends on how much longer you cook the chicken. If you find that your chicken is almost a rubbery texture, then it could use a few more minutes of cooking, up to about 20 minutes for full boneless, skinless, chicken breasts. For smaller chunks like we are using in this recipe, I would recommend cooking it for 5-6 minutes max. With the pressure cooker function, things cook very quickly. So, I wouldn't recommend pressure cooking chicken for an extensive amount of time or it will dry out.