Cheesy French Onion Meatloaf with Savory Glaze Step-by-step instructions

Before you start

Before starting, measure out all ingredients to ensure a smooth cooking process. Thinly slice the yellow onions to an even thickness so they caramelize uniformly in the skillet.

Shred the cheese while it is cold, as it melts much better when freshly grated. Preheat the oven to 375°F (190°C) and line a rimmed baking sheet with parchment paper to prevent the meatloaf from sticking during baking, which makes clean-up much easier.

Instructions

Caramelizing the Onions

1. 1Caramelize the Onions
   Sauté the sliced onions in a large skillet over medium heat, stirring frequently, for about 20 minutes until they are soft and deeply caramelized. Set aside half of the onions to mix into the meat, and keep the rest for the topping.
   Look for The onions are deep golden and sweet.
   Tip Cook the onions slowly to prevent them from burning.

The onions should be deeply golden brown, incredibly soft, and sweet, with their natural sugars fully released during the slow cooking process. You will hear a gentle sizzle in the skillet, and the kitchen will fill with a rich, sweet, and savory aroma that signals they are ready to be divided between the meat mixture and the final topping. Make sure they are not scorched or blackened before removing them from the heat.

Shaping and Baking the Meatloaf

2. 2Shape the Meatloaf
   In a large bowl, combine the seasoned ground beef with half of the caramelized onions. Gently mix the ingredients together just until combined, taking care not to overwork the meat. Shape the mixture into an even loaf on a prepared rimmed baking sheet.
   Look for The mixture is uniform and holds a loaf shape.
   Tip Wetting your hands with water prevents the meat from sticking.
3. 3Bake the Meatloaf
   Place the baking sheet in the preheated oven and bake at 375°F (190°C) for 45 minutes. Carefully insert a meat thermometer into the center of the loaf to verify it has reached a safe internal temperature of 160°F (71°C) before proceeding to the next step.
   Look for The meatloaf is firm and juices run clear.
   Safe temperature 160°F (71°C) internal temperature (ground meat)
   Tip Always use a meat thermometer for accuracy.

The meatloaf should feel firm to the touch, and a meat thermometer inserted into the center must read 160°F (71°C) to ensure the ground beef is cooked through safely. The exterior should be lightly browned, with savory juices bubbling gently around the base on the parchment paper. This indicates the meat is fully baked and ready for the final layer of glaze, onions, and cheese.

Melting the Cheese under the Broiler

4. 4Glaze, Top, and Broil
   Spread the savory glaze and the remaining caramelized onions evenly over the top of the baked meatloaf, then cover with the shredded Gruyere cheese. Return the baking sheet to the oven under the broiler for 3 to 4 minutes until the cheese is melted, bubbly, and golden. Garnish with chopped fresh parsley before slicing.
   Look for The cheese is melted, bubbly, and golden brown.
   Tip Keep a close eye on the broiler to prevent burning.

The cheese must be completely melted, bubbly, and speckled with golden-brown spots from the broiler.

The savory glaze beneath the cheese should be glistening and slightly caramelized around the edges, and the meatloaf should hold its shape perfectly when sliced, releasing a savory steam and showing off the juicy interior packed with sweet onions. The fresh parsley garnish should look bright green and vibrant against the melted cheese.

Common mistakes

One common mistake is rushing the onion caramelization process by using heat that is too high, which burns the onions instead of drawing out their natural sugars.

Another error is overworking the meat mixture when combining the beef and onions, which compresses the beef and results in a dense, tough meatloaf. Finally, using a loaf pan can trap excess grease and prevent the meatloaf from developing a nice outer crust, so a flat baking sheet is always recommended.

How to tell it’s done

To guarantee the meatloaf is perfectly cooked and safe to consume, always use a digital meat thermometer. Insert the probe into the thickest part of the center; it must reach an internal temperature of 160°F (71°C) for ground beef safety.

Avoid relying solely on cooking times or visual cues, as oven temperatures can vary. Let the meatloaf rest for ten minutes after baking to allow the juices to redistribute throughout the meat.

• Ground meat: 160°F (71°C) in the thickest part