Tender Crockpot French Onion Meatballs simmered in caramelized onion broth and topped with melted cheese. Cozy, easy, and perfect over mashed potatoes or noodles.
1.5–2 lbs frozen or homemade meatballs
3 large yellow onions, thinly sliced
3 garlic cloves, minced
2 tbsp butter
2 cups beef broth (low-sodium)
1 tbsp Worcestershire sauce
1 tsp dried thyme
1 bay leaf
1 cup shredded Gruyère, Swiss, or mozzarella cheese
Salt & pepper to taste
1 tbsp cornstarch or flour (optional for thickening)
Caramelize onions in butter over medium-low heat for 20–25 minutes. Add garlic at the end.
Deglaze pan with a bit of broth.
Add meatballs to Crockpot. Top with onions, broth, Worcestershire, thyme, and bay leaf.
Cover and cook on LOW for 4–6 hours or HIGH for 2–3 hours.
Optional: Thicken with cornstarch slurry. Cook 15–20 more minutes.
Sprinkle cheese over meatballs. Cover and let melt.
Serve hot over potatoes, noodles, or bread.
Use homemade or store-bought meatballs.
Add mushrooms or carrots for extra veggies.
Store leftovers up to 4 days, or freeze up to 3 months.