Indulge in the irresistible flavors of a classic diner favorite with our Smashing Patty with Secret Sauce recipe. Bursting with savory goodness and topped with a confidential sauce, this dish promises to satisfy even the most discerning taste buds. Crafted with care and attention to detail, each element of this recipe comes together to create a symphony of flavors that will leave you craving more. From caramelized onions to perfectly seasoned beef patties, every component is prepared with precision to ensure a mouthwatering experience with every bite. Paired with Swiss cheese and nestled between slices of rye bread, these patty melts are a comfort food classic elevated to new heights. Whether you’re cooking for a family dinner or hosting a casual gathering with friends, these Smashing Patty melts are sure to be a crowd-pleaser. So, roll up your sleeves, gather your ingredients, and get ready to embark on a culinary journey that celebrates the art of homemade goodness. Let’s dive into the recipe and discover the secrets behind this delectable dish. Preparation Time: Approximately 45 minutes. Yields: 4 Sandwiches. Ingredients: 1 tablespoon olive oil. 1 big onion, finely sliced (about 2 cups). 6 tablespoons unsalted butter, divided. Garlic powder and kosher salt, to taste. 2 tablespoons ketchup. 1 1/2 pounds lean ground beef. 2 tablespoons Worcestershire sauce. 8 slices rye bread. 1/2 teaspoon onion powder. 8 ounces Swiss cheese, sliced. Instructions: Step 1 Heat olive oil in a large pan over medium-low heat. Step 2 Cook the sliced onions for 20-25 minutes, stirring regularly, until they caramelize to a deep brown color. Step 3 Season with a pinch of salt and pepper to taste. Step 4 Meanwhile, heat a cast-iron skillet over medium-high heat. Step 5 Melt 2 tablespoons of butter in the skillet. Step 6 In a large bowl, mix together the ground beef, ketchup, Worcestershire sauce, onion powder, 1 teaspoon of salt, and a pinch of pepper. Step 7 Form the mixture into four equal patties slightly larger than the bread slices. Step 8 Cook the patties in the heated skillet for 4-5 minutes on each side, or until well browned. Remove from the skillet and set aside. Step 9 Prepare the patty melts: Remove any excess grease from the skillet and melt 2 tablespoons of the remaining butter in a medium saucepan. Step 10 Place 4 slices of rye bread in the pan, buttered side down. Top each bread slice with a burger patty, Swiss cheese, half of the caramelized onions, and another slice of cheese. Step 11 Finish with the remaining 4 slices of bread, buttered side up. Step 12 Cook each patty melt for 2-4 minutes on each side, using a spatula to gently press down on the cheese occasionally, until golden brown and the cheese is melted. Step 13 Once the patty melts are cooked, transfer them to a cutting board and slice diagonally. Serve and enjoy!