Get ready to fall in love with this diner-style classic! These Patty Melts with Secret Sauce are juicy, cheesy, and full of flavor — the perfect mix between a burger and a grilled cheese sandwich. Toasted bread, caramelized onions, melted cheese, and a tangy homemade sauce make this comfort food unforgettable!
IngredientsFor the Patty Melts:
1 lb (450g) ground beefSalt and black pepper, to taste1 tablespoon Worcestershire sauce1 tablespoon butter1 large onion, thinly sliced8 slices rye or sandwich bread8 slices Swiss or cheddar cheese2 tablespoons butter (for grilling)For the Secret Sauce:½ cup mayonnaise2 tablespoons ketchup1 tablespoon yellow mustard1 teaspoon Worcestershire sauce1 teaspoon pickle relish (optional)Pinch of garlic powder🍳 InstructionsMake the Secret Sauce:
In a small bowl, mix mayonnaise, ketchup, mustard, Worcestershire sauce, relish, and garlic powder.Stir until smooth, then set aside or refrigerate.Caramelize the Onions:Melt 1 tablespoon butter in a skillet over medium-low heat.Add the sliced onions and cook slowly for 10–15 minutes until soft and golden brown.Stir occasionally to prevent burning, then remove from the pan.Prepare the Patties:Mix ground beef with salt, pepper, and Worcestershire sauce.Shape into 4 thin patties (about the size of your bread slices).Cook in a skillet over medium-high heat for 3–4 minutes per side, or until cooked through.Set aside.Assemble the Patty Melts:Spread secret sauce on one side of each bread slice.Layer with cheese, a beef patty, caramelized onions, another slice of cheese, and top with bread.Grill the Sandwiches:Melt butter in a skillet or griddle over medium heat.Grill each sandwich for about 2–3 minutes per side until golden brown and the cheese is melted.Serve Hot:Slice in half and serve with fries or pickles on the side! Tips:Try it with sourdough bread for extra crunch.Add grilled mushrooms or jalapeños for a tasty twist.Make extra sauce — it’s delicious as a dip for fries!