Gather your ingredients. I like to use crockpot liners for convenience and easy cleanup.
Set noodles aside. You will use them last.
Add cream of mushroom soup to crockpot.
Add cream of celery soup.
Add French onion soup.
Add both cans of beef broth.
Add garlic. (If you like garlic, you can add more.)
Add stew beef.
Gently mix all together. It will look nasty and chunky, but that's ok!
If you make this ahead of time, even the night before, you can put your crockpot bag in the fridge. I tie off the bag with a clothespin to keep it sealed.
When ready to cook, place bag in crockpot and cover with lid. Set dial to Low and cook 8-10 hours.
After beef is cooked, remove lid and add entire package of noodles.
Replace cover. Set dial to high and cook an additional 10 minutes, or when noodles are soft.
Transfer to separate dish. Serve and enjoy!