Print

The Ultimate Patty Melt with Secret Sauce Recipe

4.5 from 63 reviews

The Ultimate Patty Melt with Secret Sauce is a classic American comfort food featuring juicy seasoned beef patties, caramelized onions, melty Swiss and sharp cheddar cheese, and a tangy homemade secret sauce, all sandwiched between buttery rye bread grilled to golden perfection. This recipe highlights a delicate balance of savory, sweet, and tangy flavors with a rich, melty texture that will satisfy any burger lover’s cravings.

Ingredients

Scale

Secret Sauce

  • ¼ cup mayonnaise
  • 2 tablespoons ketchup
  • 1 tablespoon Dijon mustard
  • 1 teaspoon pickle juice
  • ¼ teaspoon paprika
  • ¼ teaspoon garlic powder

Caramelized Onions

  • 2 tablespoons olive oil
  • 2 large onions, thinly sliced

Beef Patties

  • 12 ounces ground beef (85/15)
  • ½ teaspoon salt
  • ½ teaspoon black pepper
  • 1 teaspoon Worcestershire sauce

Assembly

  • 8 slices rye bread
  • 3 tablespoons unsalted butter, softened
  • 4 slices Swiss cheese
  • 4 slices sharp cheddar cheese

Instructions

  1. Make the secret sauce: Whisk together mayonnaise, ketchup, Dijon mustard, pickle juice, paprika, and garlic powder in a small bowl. Set aside to let the flavors meld.
  2. Caramelize the onions: Heat olive oil in a large skillet over medium-low heat. Add the thinly sliced onions and cook slowly, stirring occasionally for 25-30 minutes until the onions are golden brown, jammy, and sweet.
  3. Form and season beef patties: Divide the ground beef into 4 equal portions and shape into thin patties slightly larger than the bread slices. Season both sides with salt, pepper, and Worcestershire sauce.
  4. Cook the beef patties: Remove caramelized onions from the skillet and set aside. Increase heat to medium-high and cook patties for 3-4 minutes per side until browned and cooked through.
  5. Butter the bread: Generously butter one side of each slice of rye bread; these will be the exterior sides for grilling.
  6. Assemble the sandwiches: Spread secret sauce on the unbuttered side of 4 bread slices. Layer with Swiss cheese, a beef patty, caramelized onions, cheddar cheese, and top with remaining bread slices, buttered side facing out.
  7. Grill the patty melts: Cook sandwiches in the same skillet over medium heat for 3-4 minutes per side, pressing gently with a spatula until the bread is golden brown and cheese is melted. Cover the pan in the last minute of cooking to ensure the cheese melts completely.
  8. Rest and serve: Let the patty melts rest for 2 minutes before cutting diagonally to allow the cheese to set and prevent sliding.

Notes

  • Patience is key for perfectly caramelized onions; low and slow cooking brings out their natural sweetness.
  • Using a skillet for both caramelizing onions and grilling keeps flavors concentrated.
  • Butter the bread generously to ensure a crispy, golden crust during grilling.
  • Covering the pan at the end helps melt the cheese thoroughly without burning the bread.
  • Resting the sandwiches before serving helps maintain structure and flavor.

Keywords: Patty Melt, Secret Sauce, Caramelized Onions, Rye Bread Sandwich, Comfort Food, American Sandwich, Beef Patty, Grilled Sandwich