I boiled down the bones in 4 cups of water with an onion and Epicure Beef Bouillon Base (if you read my blog you know how big a fan I am of the Epicure Chicken Bouillon Base. When I went to restock, I decided to buy the beef and give it a try. It was really good as well!). I then strained the broth and used it in my soup. But if you don't want to do this to make a broth, you can use 4 cups of a store bought broth.