Preheat your oven to 350°F (175°C). Line a 9x13-inch baking dish or sheet pan with parchment paper for easy cleanup, or lightly spray it with non-stick cooking spray. This prepares your pan to prevent sticking.

In a large mixing bowl, gently combine the ground beef, Lipton Onion Soup Mix, breadcrumbs, beaten eggs, milk, and Worcestershire sauce. Use your hands to mix, but be careful not to overmix, as this can make your meatloaf tough. Mix just until all ingredients are evenly distributed and no dry spots remain.

Transfer the meat mixture to your prepared baking pan. Shape it into a uniform loaf, roughly 9-10 inches long and 4-5 inches wide. A consistent shape ensures even cooking throughout the meatloaf.

Prepare the tangy sweet glaze by whisking together the ketchup, brown sugar, and apple cider vinegar in a small bowl until well combined. The brown sugar adds sweetness and helps create a beautiful caramelized crust.

Evenly spread the prepared glaze over the top of the meatloaf. This glaze will add a delicious shiny, sweet, and tangy crust as it bakes, sealing in moisture and boosting flavor.

Bake the meatloaf, uncovered, for 45 to 60 minutes. The exact time will depend on your oven and the thickness of your loaf. To ensure it's fully cooked and safe to eat, an instant-read thermometer inserted into the thickest part should register an internal temperature of 160°F (71°C).

Once cooked, remove the meatloaf from the oven and allow it to rest on the baking pan for at least 10 minutes before slicing. Resting allows the juices to redistribute throughout the meat, ensuring a moist and tender result.

Slice the rested meatloaf into generous portions and serve immediately. It pairs wonderfully with classic sides like mashed potatoes, green beans, or roasted vegetables for a complete and satisfying meal.