Description
French Onion Meatballs are a savory and comforting dish combining juicy, herb-infused beef meatballs with a rich, deeply caramelized French onion sauce topped with melted Gruyere and mozzarella cheeses. Perfect as a hearty meal, these meatballs are seared to develop a golden crust, then simmered in the classic onion gravy before finishing under the broiler for a gooey cheesy topping. Serve with toasted bread or mashed potatoes for a satisfying experience.
Ingredients
Meatballs
- 1 1/2 cups fresh breadcrumbs (or panko breadcrumbs)
- 1/4 cup plus 2 tablespoons whole milk
- 1 1/2 pounds organic ground beef (85/15 ratio)
- 1 tablespoon chopped parsley
- 1 teaspoon fresh thyme leaves, plus extra for garnish
- 1 teaspoon herbes de Provence
- Salt (about 1 teaspoon, or your desired amount)
- Black pepper (about 1/4 teaspoon, or your desired amount)
- 1/2 large, white onion, finely minced
- 4 cloves garlic, pressed through garlic press
- 3/4 cup grated Gruyere cheese, divided use
- 1 egg, whisked
Sauce & Cooking
- 1 cup shredded, whole milk mozzarella cheese
- 4 tablespoons olive oil, divided use
- 2 tablespoons ghee or butter
- 2 1/2 large, white onions, halved and sliced
- Salt, to taste
- Black pepper, to taste
- 4 cloves garlic, pressed through garlic press
- 1 teaspoon herbes de Provence
- 1 teaspoon dried thyme
- 1/4 cup sherry (or white wine)
- 1 1/2 tablespoons flour
- 2 1/4 cups beef stock
- 2 teaspoons fresh thyme leaves
Instructions
- Prep Ingredients: Gather and prepare all meatball ingredients as listed to be organized and ready for assembly.
- Soak Breadcrumbs: Place breadcrumbs into a dish and add the milk to soak for 5 minutes. Simultaneously, place ground beef in a large bowl.
- Mix Meatball Ingredients: After soaking, add the milk-soaked breadcrumbs to the beef along with parsley, thyme, herbes de Provence, salt, pepper, minced onion, garlic, 1/4 cup Gruyere cheese, and whisked egg. Mix gently by hand until evenly combined but do not overmix to keep meatballs tender.
- Form Meatballs: Scoop 2 tablespoon-size portions of the mixture using a cookie scoop or spoon onto a tray. Wet hands slightly and roll each into a round meatball. Refrigerate for 15 minutes to chill and firm up.
- Prep Sauce Ingredients: While meatballs chill, prepare ingredients for the French onion sauce.
- Sear Meatballs: Heat a large cast iron skillet or oven-safe heavy pan over medium-high heat with 2 tablespoons olive oil. Add some meatballs in batches and brown on all sides for about 8-10 minutes. Remove browned meatballs to a tray and repeat with remaining meatballs.
- Caramelize Onions: In same skillet, add remaining 2 tablespoons olive oil if needed, plus ghee or butter. Add sliced onions with a pinch of salt and pepper. Cook on medium-high heat for 20-25 minutes, stirring frequently, until onions are deeply caramelized, dark, soft, and jammy.
- Add Aromatics and Deglaze: Stir in garlic, herbes de Provence, and dried thyme for about 30 seconds until fragrant. Pour in sherry or white wine and let bubble and reduce for 30 seconds.
- Make Sauce Base: Sprinkle flour over onions, stirring to incorporate for 30 seconds. Slowly whisk in beef stock until smooth. Allow sauce to simmer for about 5 minutes to thicken slightly.
- Prepare for Broiling: Turn broiler on high. Turn off stove heat under sauce and stir in fresh thyme leaves. Nestle browned meatballs back into skillet and top with remaining Gruyere and shredded mozzarella cheeses.
- Bake under Broiler: Place skillet under broiler for 5-7 minutes until cheese is melted, bubbly, and gooey.
- Serve: Garnish meatballs with extra fresh thyme leaves. Serve warm with lots of French onion sauce and cheese spooned over. Enjoy with toasted bread or mashed potatoes if desired.
Notes
- Using fresh breadcrumbs helps keep meatballs tender, but panko can be substituted for more texture.
- Do not overmix the meatball mixture to retain juiciness and tenderness.
- Caramelizing onions takes time but is crucial for deep flavor—be patient and stir often to avoid burning.
- If you don’t have sherry, dry white wine or even a splash of balsamic vinegar can work as a substitute.
- Using a cast iron or heavy skillet ensures even searing and good heat retention for sauce making.
- Meatballs can be made ahead and refrigerated before cooking to save time on the day of serving.
- Serving with toasted crusty bread or creamy mashed potatoes complements the rich sauce beautifully.
- Prep Time: 20 minutes
- Cook Time: 1 hour 10 minutes
- Category: Main Course
- Method: Stovetop
- Cuisine: French
