To reheat: Store the potatoes in an airtight container in the refrigerator for up to 7 days. Cover the container and set it in an oven set to 400℉ for 20 minutes, stirring occasionally. Alternatively, reheat in the pressure cooker on sauté mode for 5 minutes, stirring frequently.
Find it online: https://daniellewalker.com/instant-pot-mashed-potatoes/