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Patty Melts with Secret Sauce Recipe

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4.2 from 14 reviews

Delicious Patty Melts featuring juicy seasoned beef patties, sweet caramelized onions, melted Swiss cheese, and a tangy secret sauce, all grilled between buttered rye or sourdough bread slices. This classic diner-style sandwich is perfect for a quick and satisfying meal.

Ingredients

For the Patties:

  • 1 lb (450 g) ground beef (80/20 works best)
  • 1 tsp Worcestershire sauce
  • 1 tsp garlic powder
  • ½ tsp onion powder
  • ½ tsp smoked paprika
  • ½ tsp salt
  • ¼ tsp black pepper

For the Onions:

  • 2 medium yellow onions (thinly sliced)
  • 2 tbsp unsalted butter
  • 1 tsp olive oil
  • Pinch of salt

For the Secret Sauce:

  • ½ cup mayonnaise
  • 2 tbsp ketchup
  • 1 tbsp yellow mustard
  • 1 tbsp finely diced pickles (or relish)
  • ½ tsp smoked paprika
  • ½ tsp garlic powder

For Assembly:

  • 8 slices rye bread (or sourdough if you prefer)
  • 8 slices Swiss cheese (or cheddar for variation)
  • 2 tbsp butter (softened for spreading on bread)

Instructions

  1. Make the Caramelized Onions: In a skillet, melt the unsalted butter with olive oil over medium heat. Add the thinly sliced onions and a pinch of salt. Cook, stirring often, until the onions are golden brown and caramelized, about 12 to 15 minutes. Remove from heat and set aside.
  2. Mix and Cook the Patties: In a mixing bowl, combine ground beef with Worcestershire sauce, garlic powder, onion powder, smoked paprika, salt, and black pepper. Divide the mixture into 4 thin patties roughly the same size as your bread slices. Cook the patties in a skillet over medium-high heat for 3 to 4 minutes per side until browned and cooked through. Transfer to a plate and keep warm.
  3. Make the Secret Sauce: In a small bowl, stir together mayonnaise, ketchup, yellow mustard, finely diced pickles or relish, smoked paprika, and garlic powder until smooth. Set the sauce aside.
  4. Assemble the Patty Melts: Spread softened butter on one side of each bread slice. On the unbuttered side, layer the sandwich starting with a slice of bread, then a slice of cheese, followed by a beef patty, a generous amount of caramelized onions, a spoonful of secret sauce, another slice of cheese, and top with the remaining bread slice.
  5. Grill the Sandwiches: Heat a clean skillet or griddle over medium heat. Place the assembled sandwiches on the skillet and cook for 2 to 3 minutes per side until the bread is golden brown and crispy, and the cheese melts. Press gently with a spatula to help bind the layers together. Remove from the skillet, slice if desired, and serve warm.

Notes

  • For juicier patties, avoid pressing down on the meat while cooking.
  • Use rye bread for a traditional flavor, or sourdough for a milder taste.
  • Switch Swiss cheese with cheddar for a sharper flavor variation.
  • Customize the secret sauce by adding a dash of hot sauce or smoked chipotle for extra kick.
  • Make caramelized onions ahead of time and store refrigerated for up to 3 days.