thank u so much for continuing to ask about bones catboy <3 preheat oven to 450°F. Place marrow bones on a tray or ovenproof skillet, bone side down. Roast until the bones are lightly browned, about 20 minutes. Some fat will render from the bones, but the majority of the marrow should stay in the bone. Serve immediately, with bread and a sharp green salad on the side.