Ultimate Patty Melts with Secret Sauce

Ingredients:For the Patty Melts:1 lb ground beef (80/20 blend for best flavor)Salt and pepper to taste8 slices rye bread (or substitute sourdough or Texas toast)8 slices Swiss cheese (or try cheddar or provolone for a twist)2 large yellow onions, thinly sliced4 tablespoons butter, dividedOptional Toppings:Lettuce, tomato slices, picklesExtra condiments like mustard or ketchupSecret Sauce (Easy and Delicious!)This tangy, creamy spread takes your patty melt to the next level.1/4 cup mayonnaise2 tablespoons ketchup1 tablespoon sweet pickle relish1/2 teaspoon garlic powder1/2 teaspoon onion powderA dash of hot sauce (optional, for a kick)Instructions: Mix all ingredients in a small bowl. Refrigerate for at least 15 minutes to let the flavors meld.Instructions:Form the PattiesDivide the ground beef into 4 equal portions and gently shape into flat patties, slightly larger than your bread (they shrink while cooking). Season both sides with salt and pepper.Cook the PattiesHeat 1 tablespoon of butter in a large skillet over medium-high heat. Cook patties 4–5 minutes per side until nicely browned and cooked through. Set aside.Caramelize the OnionsIn the same skillet, melt the remaining butter. Add sliced onions and cook on medium-low heat for 15–20 minutes, stirring occasionally, until soft and golden brown. Remove and set aside.Assemble the SandwichesWipe the skillet clean. Lay out 4 slices of bread. On each, add a slice of Swiss cheese, a cooked patty, a spoonful of caramelized onions, and a second slice of cheese. Spread a generous amount of secret sauce on the top slice of bread, then place it on the sandwich.Grill to PerfectionReturn sandwiches to the skillet over medium heat. Press them down slightly and cook 2–3 minutes per side until the bread is golden and the cheese is melted. Cook in batches if necessary.Serve and EnjoyLet the patty melts rest briefly, then slice in half and serve hot with fries, pickles, or a side salad.Helpful Tips:Bread choice matters: Rye adds classic flavor, but sourdough or even brioche makes for a delicious twist.Use a cast iron skillet: It gives the best crust and even cooking.Make ahead: Caramelized onions and the secret sauce can be prepped a day in advance to save time.Enjoy!