Place a large pan over medium-high heat. Coat the pan with cooking oil. Brown the beef ribs. (I could only brown one side since they have such a curve on the other side.)
Place the ribs into a 6-quart slow cooker.
Add the onion soup mix, onions, and pour over the beer.
Cover and cook on LOW for 8 hours without opening the lid during the cooking time.
Serve and enjoy!
Notes
Can I use something other than beer?
Yes! Use beef broth in place of the beer if needed. Still will taste great.