French Onion Meatloaf

French Onion Meatloaf is a decadent fusion of two comforting classics — the hearty flavor of meatloaf with the caramelized, savory sweetness of French onion soup. This gourmet-style meal is guaranteed to become a show-stopping centerpiece at any dinner table, offering a flavor-packed experience with a beautifully moist interior and a golden, cheesy topping. Whether you’re preparing for a cozy family dinner or an elevated gathering, this recipe will deliver unmatched satisfaction.

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🧾 Ingredients Table

Ingredient Quantity
Ground beef (80/20 blend) 2 lbs
Sweet onions, thinly sliced 3 large
Olive oil 2 tablespoons
Garlic, minced 4 cloves
Worcestershire sauce 2 tablespoons
Beef broth 1 cup
Eggs 2 large
Panko breadcrumbs 1 cup
Fresh thyme, chopped 1 tablespoon
Salt 1 ½ teaspoons
Ground black pepper 1 teaspoon
Dijon mustard 2 teaspoons
Mozzarella cheese, shredded 1 cup
Gruyère cheese, shredded 1 cup
Butter 2 tablespoons
All-purpose flour 1 tablespoon
Milk ½ cup

Bold, complex flavors and a juicy, tender texture elevate this meatloaf well above the average. The combination of caramelized onions, aromatic herbs, and a cheesy crust creates a mouthwatering umami depth reminiscent of classic French cuisine — all while maintaining the rustic heartiness of meatloaf. It’s weeknight accessible yet dinner-party impressive.

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🧅 Step-by-Step Instructions for the Perfect French Onion Meatloaf

🔪 1. Caramelize the Onions Like a Pro

Start by heating olive oil in a large skillet over medium heat. Add the thinly sliced onions and a pinch of salt. Stir frequently, allowing them to soften and slowly caramelize — this will take around 25–30 minutes. Add a splash of beef broth occasionally to deglaze the pan and enhance the depth of flavor. Once deeply golden and sweet, stir in the minced garlic, cooking for another 2 minutes.

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Pro Tip: Don’t rush the caramelization — it’s the heart of the dish’s flavor.

🥣 2. Prepare the Meatloaf Mixture

In a large mixing bowl, combine:

  • Ground beef

  • Panko breadcrumbs

  • Eggs

  • Worcestershire sauce

  • Dijon mustard

  • Fresh thyme

  • Salt & pepper

  • Half of the caramelized onions

Mix gently with your hands or a spatula until just combined. Avoid overmixing, which can make the loaf dense.

🧱 3. Shape and Bake

Preheat your oven to 375°F (190°C).

Transfer the mixture onto a parchment-lined baking sheet and shape into a loaf. You can also use a loaf pan for a more uniform shape. Bake for 35–40 minutes uncovered.

🧀 4. Prepare Cheese Sauce

While the meatloaf bakes, melt butter in a saucepan, stir in flour to make a roux, and cook for 1–2 minutes. Gradually whisk in milk, followed by the remaining beef broth, and cook until thickened. Remove from heat and stir in shredded mozzarella and Gruyère until smooth and velvety.

🔥 5. Assemble and Broil

Remove the meatloaf from the oven. Top with:

  • The remaining caramelized onions

  • Generous spoonfuls of cheese sauce

  • Extra shredded Gruyère for a bubbly crust

Return to the oven under the broiler for 3–5 minutes, or until golden brown and lightly crisped on top.

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