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Ultimate Patty Melt with Secret Sauce

The Ultimate Patty Melt is a classic diner favorite elevated with a delicious secret sauce. Featuring juicy beef patties, caramelized onions, and melty Swiss cheese, all sandwiched between buttery rye bread, this sandwich is a mouthwatering delight perfect for any meal.
Prep Time15 minutes
Active Time30 minutes
Total Time45 minutes
Course: dinner
Cuisine: American
Keyword: Ultimate Patty Melt with Secret Sauce
Yield: 4

Materials

For the Patty Melt:

  • - 1 lb ground beef
  • - 8 slices of rye bread
  • - 8 slices of Swiss cheese
  • - 1 large onion thinly sliced
  • - 4 tbsp butter plus more for spreading
  • - Salt and pepper to taste

For the Secret Sauce:

  • - 1/2 cup mayonnaise
  • - 2 tbsp ketchup
  • - 1 tbsp relish
  • - 1 tsp Worcestershire sauce
  • - 1/2 tsp garlic powder
  • - 1/2 tsp onion powder
  • - Salt and pepper to taste

Instructions

Prepare the Secret Sauce:

  • - In a small bowl, mix together mayonnaise, ketchup, relish, Worcestershire sauce, garlic powder, and onion powder. Adjust seasoning with salt and pepper to taste. Set aside.

Caramelize the Onions:

  • - In a skillet over medium heat, melt 1 tbsp of butter. Add the thinly sliced onions, season with salt and pepper, and cook until caramelized, about 10-15 minutes. Transfer to a plate and set aside.

Form and Cook the Patties:

  • - Form the ground beef into 4 patties, slightly larger than your bread slices. Season both sides with salt and pepper.
  • - In the same skillet, cook the patties to your desired doneness, about 4 minutes per side for medium. Remove and set aside.

Assemble the Sandwiches:

  • - Butter one side of each bread slice. Spread the secret sauce on the non-buttered side of 4 slices.
  • - On each sauced slice, add a slice of Swiss cheese, a cooked patty, caramelized onions, another slice of Swiss cheese, and top with another bread slice, buttered side up.

Grill the Sandwiches:

  • - In a clean skillet over medium heat, grill the sandwiches until golden brown and the cheese is melted, about 3-4 minutes per side.

Serve:

  • - Once cooked, cut the patty melts in half and serve hot.