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 mins
Active Time30 minutes mins
Total Time45 minutes mins
 
Course: dinner
Cuisine: American
Keyword: Ultimate Patty Melt with Secret Sauce
 
Yield: 4
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
 
 
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.