Preheat the oven to 350 degrees and lightly grease a loaf pan.
In a large bowl, combine the ground beef, crushed Ritz crackers, Parmesan cheese, minced garlic, chopped onion, eggs, milk, salt, and black pepper.
Mix with clean hands until the ingredients are evenly distributed but the meat is not overworked.
Press the mixture firmly into the prepared loaf pan and smooth the top.
Drizzle the melted butter evenly over the surface of the loaf.
Bake for 1 hour and 10 minutes, or until the internal temperature reaches 160 degrees.
Remove from the oven and let the meatloaf rest in the pan for 10 minutes before slicing.