I'm so glad you asked! Cooking carnitas from frozen has never been easier, thanks to the Instant Pot. Go ahead and add your frozen roast and liquid to the Instant Pot, then cook on High Pressure for 75 minutes. Just remember to use the Natural Pressure Release (NPR) so the meat doesn't seize up. Allowing the pressure to dissipate naturally will keep the meat tender. I usually plan on NPR taking 20-25 minutes, so be sure to account for that time when you plan your schedule.