This classic Patty Melt recipe features savory ground beef patties, deeply caramelized onions, and luscious Swiss cheese, all sandwiched between slices of toasted rye bread. Cooked to golden perfection in butter, it's a comforting and hearty meal, perfect for a satisfying lunch or dinner. The slow cooking of onions is key to its rich flavor profile.
Achieving perfectly caramelized onions is paramount; cook them slowly over low to medium-low heat for 20-25 minutes, stirring occasionally, until deeply golden and sweet. Rushing this step will result in undercooked, pungent onions. For the patties, avoid overworking the ground beef to maintain tenderness and season generously. When grilling the assembled melts, maintain a consistent medium heat to allow the cheese to fully melt and the bread to toast evenly to a rich, golden brown without burning. Using sufficient butter on the griddle is key for a crisp, flavorful crust. Consider adding a touch of Dijon mustard or a whisper of garlic powder to the beef mixture for an extra layer of flavor. Serve immediately to enjoy the gooey cheese and warm, crisp bread.