Crock Pot French Onion Meatballs

Crock Pot French Onion Meatballs are a comforting and savory dish that combines the classic flavors of French onion soup with the ease of slow-cooked meatballs. Simmered in a rich broth and topped with melted mozzarella cheese, these tender meatballs are perfect for serving over mashed potatoes, egg noodles, or on their own as a hearty appetizer. With just a few ingredients and minimal prep time, this is a flavorful slow cooker recipe the whole family will love.

Why You’ll Love This Recipe

• Effortless slow cooker meal: Just toss in the ingredients and let your crock pot do the work.

• Rich, savory flavor: French onion soup and beef broth create a deeply flavorful sauce.

• Crowd-pleaser: Perfect for parties, potlucks, or weeknight dinners.

• Cheesy and hearty: Melted mozzarella on top adds a comforting finish.

• Versatile serving options: Great over mashed potatoes, pasta, rice, or served with bread.

• Freezer-friendly: Ideal for meal prep and storing leftovers.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

• 24-ounce bag frozen beef homestyle meatballs (a little more or less is fine)

• 10.5-ounce can French onion soup (low sodium)

• 1 packet French onion soup mix (or beefy onion soup mix)

• 1 cup beef broth (low sodium)

• 1 cup shredded mozzarella cheese (more to taste)

• Fresh thyme or parsley (optional, for garnish)

Optional (to thicken the sauce):

• 2 tablespoons corn starch

• ¼ cup water

Directions

1. Place the frozen meatballs in a single layer at the bottom of a 4–6 quart slow cooker.

2. Pour the French onion soup over the meatballs.

3. Sprinkle the soup mix over the top, then pour in the beef broth.

4. Cover and cook on high for 2–3 hours or low for 5–6 hours until the meatballs are heated through and the flavors are well blended.

5. (Optional) To thicken the sauce, mix cornstarch and water in a small bowl to create a slurry. Stir the slurry into the slow cooker and cook for an additional 10 minutes.

6. Sprinkle mozzarella cheese evenly over the top. Cover again and cook until the cheese is fully melted.

7. Garnish with fresh thyme or chopped parsley before serving if desired.

Servings and timing

Servings: 8
Prep Time: 10 minutes
Cook Time: 4–6 hours (depending on heat setting)
Total Time: 4–6 hours and 10 minutes
Calories: Approximately 335 kcal per serving

Variations

• Use turkey or chicken meatballs: A lighter alternative to beef with the same great flavor.

• Add sautéed onions: For even more French onion depth, add caramelized onions to the mix.

• Spice it up: Add a pinch of red pepper flakes or a splash of Worcestershire sauce for added depth.

• Top with Swiss or provolone: Swap mozzarella for traditional French onion cheese options.

• Make it a sandwich: Serve the meatballs and sauce on toasted hoagie rolls for a French onion meatball sub.

Storage/Reheating

Storage:
Store leftovers in an airtight container in the refrigerator for up to 4 days.

Freezing:
Let the meatballs cool completely and freeze in a sealed container for up to 3 months.

Reheating:
Reheat in the microwave or on the stovetop over low heat until warmed through. Add a splash of broth if the sauce has thickened too much.

FAQs

Can I use homemade meatballs instead of frozen?

Yes, but make sure they’re fully cooked before adding them to the slow cooker, or brown them beforehand to hold their shape.

Is it necessary to thaw the frozen meatballs first?

No, they can go into the slow cooker straight from the freezer.

Can I make this recipe in an Instant Pot?

Yes, use the slow cook function or pressure cook for about 5–7 minutes followed by a quick release.

How can I reduce the saltiness of this recipe?

Use low-sodium versions of the soup, broth, and soup mix. Avoid adding extra salt until after tasting.

What should I serve with French onion meatballs?

Mashed potatoes, egg noodles, white rice, or crusty bread all pair wonderfully with the rich sauce.

Can I add vegetables to the slow cooker?

Yes, mushrooms, green beans, or bell peppers would complement the dish well. Add them at the beginning of cooking.

Will this recipe work without cheese?

Absolutely. The dish will still be flavorful and hearty even without the cheese topping.

Can I make this dairy-free?

Yes, omit the cheese or use a dairy-free alternative that melts well.

How do I know when the meatballs are fully cooked?

If using pre-cooked frozen meatballs, they just need to be heated through. Internal temperature should be at least 165°F.

Can I double the recipe?

Yes, just make sure your slow cooker is large enough to hold everything without overcrowding.

Conclusion

Crock Pot French Onion Meatballs are a deliciously simple way to enjoy the bold flavors of French onion soup in a hearty, comforting dish. With minimal prep and a handful of ingredients, this recipe delivers rich taste and tender meatballs that are perfect for cozy dinners or entertaining guests. Whether served over mashed potatoes or piled onto a sandwich, these meatballs are sure to become a new family favorite.

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