1. Prep Your Onions
Slice the onions into thick rings. You want them to hold up during the slow cooking process.
Separate the rings and set aside.
2. Make the Sauce
In a microwave-safe bowl, melt the stick of butter.
Add the beef broth, Worcestershire sauce, brown sugar, garlic powder, black pepper, and salt. Stir until well combined.
3. Assemble in the Slow Cooker
Place a layer of onion rings at the bottom of the slow cooker.
Pour a bit of the sauce over the onions.
Repeat the layering process until all the onions and sauce are used up.
4. Cook Low and Slow
Set your slow cooker to low and cook for 6-8 hours. If you’re in a hurry, you can set it to high for 3-4 hours, but slow and steady wins the race for the best caramelization.
5. Optional Cheesy Finish
If you’re a cheese lover, sprinkle shredded mozzarella over the onions about 15 minutes before serving. Cover and let it melt into gooey perfection.
FAQs
Q: Can I use any type of onion for this recipe? A: While you can use any onion, sweet onions like Vidalia or Walla Walla are best for that rich, caramelized flavor.

Q: Can I make this recipe in an Instant Pot instead? A: Absolutely! Use the sauté function to caramelize the onions first, then switch to slow cook mode.

Q: How do I store leftovers? A: Store any leftovers in an airtight container in the fridge for up to 3 days. Reheat gently on the stove or in the microwave.

Q: Can I add other vegetables to this dish? A: Sure, mushrooms and bell peppers make excellent additions. Add them in the last 2 hours of cooking for best results.

Q: Is this dish gluten-free? A: Yes, as long as you ensure your Worcestershire sauce is gluten-free, the dish is naturally gluten-free.

Conclusion
There you have it, folks! Slow Cooker Tennessee Onions are not just a dish; they’re a nostalgic journey back to simpler times. With this easy recipe, you can bring a slice of Southern comfort to your modern kitchen. So, grab your slow cooker, gather your ingredients, and let the magic happen. Your taste buds will thank you!