1-First: melt 2 tablespoons of butter in a medium skillet over medium-low heat and add the sliced onions. Cook them slowly for 20 to 25 minutes, stirring now and then, until they’re golden brown and soft. This step brings out that sweet flavor that makes patty melts special.

2-Next, in a medium bowl, mix the ground beef with salt, pepper, and 5 dashes of Worcestershire sauce. Shape this mixture into 4 patties, making sure they’re not too thick so they cook evenly. Then, in a separate skillet, melt another 2 tablespoons of butter over medium heat and cook the patties on both sides until they’re done to your liking. Avoid pressing them down to keep them juicy, as one tip suggests.

3-Now, assemble the sandwiches: On a slice of rye bread, layer one slice of Swiss cheese, a cooked patty, a quarter of the caramelized onions, another slice of cheese, and top with a second slice of bread. Heat 2 tablespoons of butter in a clean skillet over medium heat and grill the sandwiches until the bottom is golden brown. Flip them after adding the remaining butter and cook until the other side is golden and the cheese melts. Finally, slice each sandwich in half and serve right away for the best taste.