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Cheesy French onion soup meatballs crockpot recipe in a white slow cooker on a wooden board with toothpicks for serving.

Crockpot French Onion Meatballs

These crockpot French onion meatballs are pure comfort food with a cheesy twist! Serve them as a hearty appetizer or pile them onto toasted French bread, smothered with sauce and melty Swiss cheese, for a cozy, bistro-style dinner at home.
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Author Kori
Prep Time 10 minutes
Cook Time 5 hours
Total Time 5 hours 10 minutes
Course Slow Cooker Appetizers
Cuisine American
Servings 10
Calories 317 kcal

Ingredients
  

  • 28 to 32 ounce bag frozen beef or homestyle meatballs
  • ½ cups frozen chopped onions
  • 10.5 ounce can condensed French onion soup
  • 1 tablespoon cornstarch
  • 1 teaspoon dried thyme
  • 1 package dry onion soup mix
  • 1 tablespoon Worcestershire sauce
  • ½ cup sour cream
  • 4 ounces grated swiss cheese (plus extra for serving)

Instructions
 

  • Whisk together French onion soup and cornstarch.
    Whisking together French onion soup mix and cornstarch in a white bowl.
  • Place onions on the bottom of the crockpot and top with meatballs, the French onion soup mix, thyme, dry onion soup mix, and Worcestershire.
    Adding meatballs and remaining French onion meatball ingredients to the crockpot.
  • Cover and slow cook on low for 4 to 6 hours or until the meatballs are heated through.
    Slow cooking the crockpot French onion soup meatballs.
  • Stir in sour cream and cheese. Adjust seasoning to taste.
    Adding the sour cream and swiss cheese to the crockpot French onion meatballs.

Video

Notes

For more helpful hints, substitution ideas, slow cooking tips, and other delicious recipe ideas, check out my post above.
TIPS: For the best flavor, use homestyle meatballs and real grated Swiss cheese. Let the slow cooker do its thing—low and slow makes the onions melt into the sauce. Stir in the sour cream and cheese at the very end so the sauce stays creamy and smooth.
VARIATIONS: Swap Swiss for Gruyère or provolone for a slightly different cheesy finish. Add a splash of sherry or red wine when mixing in the soup for a more authentic French onion flavor. You can also use turkey or chicken meatballs if you want a lighter version.
SERVING SUGGESTIONS: Serve on toasted French bread with a generous sprinkle of Swiss cheese and fresh herbs for a cozy, open-faced sandwich. Or keep it simple and serve straight from the crock as an appetizer with toothpicks. Pair with a crisp green salad or roasted veggies to round out the meal.

Nutrition

Calories: 317kcalCarbohydrates: 7gProtein: 20gFat: 23gSaturated Fat: 10gPolyunsaturated Fat: 2gMonounsaturated Fat: 9gCholesterol: 75mgSodium: 334mgPotassium: 342mgFiber: 1gSugar: 1gVitamin A: 182IUVitamin C: 3mgCalcium: 187mgIron: 1mg
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