Margaret Nadeau of Boerne, Texas, is a two-time CASI champion, 2005 and 2009, according to her recipe page. The page names where each item was bought, mostly Mild Bill's, with broth and bouillon from a local store. The same recipe appears essentially unchanged under 2014 champion Jason Goains.
How they cook
Two pounds of chili grind cook in beef broth and tomato sauce; the first spice dump simmers 50 minutes and the second 30.