Preheat your oven to 350°F (175°C). Grease a 12-cup muffin tin.

In a large mixing bowl, combine the ground beef, bread crumbs, milk, ketchup, finely chopped onion, beaten egg, Worcestershire sauce, garlic powder, salt, and black pepper. Mix until well combined.

Divide the meat mixture evenly among the muffin cups, pressing gently to fill each cup.

Bake in the preheated oven for 20-25 minutes, or until the meatloaf muffins are cooked through and a meat thermometer reads 160°F (71°C).

While the meatloaf muffins are baking, prepare the mashed potato frosting. In a medium saucepan, heat the mashed potatoes, milk, and butter over medium heat until warmed through. Season with salt and pepper to taste.

Once the meatloaf muffins are done, remove them from the oven and let them cool slightly in the pan.

Transfer the mashed potatoes to a piping bag fitted with a star tip, or use a spoon to top each meatloaf muffin with a dollop of mashed potatoes.

Garnish with fresh parsley if desired and serve warm.

Prep Time: 15 minutes