If you want to eat marrows directly from their bones after cooking, look for sturdy bones with lots of marrow inside. Ask the butcher to cut the bones crosswise so that they are about 3 inches (7. 6 cm) high.
If you are making bone broth from your roasted marrow bones, purchase 2 pounds (0. 91 kg) of marrow bones to make about 2 US quarts (1. 9 L) of bone broth. [3] X Research source If this is your first time roasting bone marrow, purchase a few extra bones in case you make any mistakes. Ask your butcher if they have any recommendations for how many bones to purchase for the meal you want to make.
For a quicker preparation, sprinkle salt and pepper on all sides of the marrow bones right before you roast them. Season the bones with just salt and pepper to make the rich marrow flavors stand out. [5] X Research source
If you want to roast cut bones, place them marrow side up on the baking sheet or roasting pan. If you are roasting uncut bones, stand the seasoned bones upright in a roasting pan.
If you are serving uncut marrow, you can use a spoon to eat the marrow. You can also suck the marrow directly from the bone.