And, of course, the ingredients for the Secret Sauce:

1. 1/2 cup mayonnaise
2. 2 tablespoons ketchup
3. 1 tablespoon pickle relish
4. 1/2 teaspoon onion powder
5. 1/2 teaspoon garlic powder

Crafting Your Patty Melt with Secret Sauce

1. Start by making your patties. Form the ground beef into four equal-sized patties, seasoning both sides with salt and pepper.
2. In a skillet, cook your patties over medium heat to your preferred level of doneness. Once cooked, remove from the skillet and set aside.
3. Using the same skillet, add a little butter and your sliced onion. Cook until the onion is caramelized, stirring occasionally to prevent burning.
4. While your onions are cooking, prepare the secret sauce. Mix together the mayonnaise, ketchup, pickle relish, onion powder, and garlic powder in a bowl. Set aside.
5. Assemble your patty melts. Spread the secret sauce on one side of each slice of bread. On four slices, add a slice of cheese, a cooked patty, a portion of caramelized onions, another slice of cheese, and top with another slice of bread (sauce side down).
6. In a clean skillet, melt a bit of butter over medium heat. Cook each patty melt until golden brown and the cheese is melted, flipping once.

This Patty Melt with Secret Sauce recipe maintains the comforting familiarity of the original dish while adding a fresh, exciting twist. The secret sauce gives the sandwich a tangy and flavorful boost that will make your taste buds sing. It’s an easy and delicious recipe perfect for a weeknight dinner or a casual weekend meal. So, why wait? Give it a go and bring the diner classic right into your kitchen.