You can use a variety of bones for beef bone broth, and for this recipe, we're using leftover bones from my smoked beef ribs and smoked prime ribs recipes, though you could use bones from my braised short ribs as well, along with nearly any beef bones. In general, bones with lots of marrow contain the most flavor, and are the best beef bones to find fats that promote a healthy immune system. Gelatinous bones, such as beef knuckle bones and joint bones, give the bone broth its rich thickness, making them another perfect choice. Sliced soup bones are another solid choice. You can collect bones for a beef bone broth by saving them after meals, wrapping them tightly in tin foil, and freezing them for later. Make sure to mark them with the name and date.