Put roast in CrockPot. Dump beef stock, beer, and french onion soup on top.
Step Two:
Cover. Set on low and cook for about 8 hours, or until meat is tender.
Step Three:
Break up the beef using forks. Spoon out some of the juice into a ramekin or small bowl for the au jus to dip in.
Step Four:
Cut buns in half and spread generously with butter. Set oven to a low broil. Put buns in oven for a couple minutes. Keep a close eye to make sure they don’t burn.
Dish Up:
Put the meat in the bun and serve with au jus. Enjoy!