Beef short ribs can be tough if they are not cooked properly. This is because beef short ribs contain a lot of connective tissue, which can be tough and chewy if not properly broken down during cooking. However, with the right cooking technique, beef short ribs can become very tender and flavorful. One of the best ways to prepare beef short ribs is by using a slow-cooking method, such as braising. This can be achieved using the Instant Pot because cooking in liquid under pressure mimics the low and slow braising method, just in a shorter amount of time.