Step 1: Prepare the Caramelized Onions
The key to this recipe is the caramelized onions, which add that deep, sweet flavor to the meatloaf. Here’s how to get them just right :
In a large skillet, melt 1 tablespoon of butter over medium heat.
Add 1 large onion, thinly sliced, and cook slowly, stirring occasionally.
Cook for about 20-25 minutes, until the onions are golden-brown and tender. Don’t rush this process it’s what gives your meatloaf that rich, complex flavor.
Set aside to cool before adding them to the meat mixture.
Step 2: Mix the Meatloaf Ingredients
In a spacious mixing bowl, mix all the ingredients for the meatloaf:
Add the ground beef, breadcrumbs, eggs, garlic, Worcestershire sauce, dried thyme, salt, and pepper.
Gently fold in the cooled caramelized onions and half of the shredded Gruyère cheese.
Mix everything together using your hands or a spoon but be careful not to overwork the meat. You want a light and tender texture, not a dense loaf.
Step 3: Form and Bake the Meatloaf
Transfer the meat mixture into a greased loaf pan and shape it into an even, smooth loaf.
Place the pan in the preheated oven at 375°F (190°C) and bake for about 40-45 minutes. The meatloaf should be fully cooked through, and the top should be slightly golden.
For extra flavor, baste the top with a little beef broth halfway through the baking time. This will help keep the meatloaf moist.
Step 4: Add the Topping
About 5 minutes before the meatloaf is done, top it with the remaining caramelized onions and Gruyère cheese.
Pop it back into the oven to bake for an additional 5 minutes, until the cheese is melted and bubbly, creating a golden crust.
Step 5: Let It Rest
Once your French Onion Meatloaf is finished, let it rest for about 10 minutes before slicing. This allows the juices to redistribute, ensuring every bite is as moist and flavorful as possible.