Patty Melt – A Classic Diner Sandwich with Melty Cheese & Caramelized Onions

A patty melt is the perfect combination of a juicy hamburger patty, buttery toasted bread, gooey melted cheese, and deeply caramelized onions. It tastes like the best parts of a burger and a grilled cheese combined. Crispy on the outside and tender, melty, and savory on the inside—this comforting sandwich is a true diner classic!

Ingredients

1 lb (450g) ground beef

Salt & black pepper, to taste

1 teaspoon garlic powder (optional)

1 large onion, thinly sliced

2 tablespoons butter (for onions)

8 slices rye bread (or sourdough/white bread)

8 slices Swiss cheese (or cheddar/American cheese)

3–4 tablespoons butter (for grilling the sandwiches)

Instructions

  1. Caramelize the Onions
  2. In a skillet over medium heat, melt 2 tablespoons of butter.
  3. Add the sliced onions and cook slowly for 15–20 minutes, stirring often, until golden and soft.
  4. Season with a pinch of salt. Set aside.
  5. Prepare the Beef Patties
  6. Season the ground beef with salt, pepper, and garlic powder.
  7. Divide into 4 thin patties, shaped roughly like your bread slices.
  8. Heat a skillet over medium-high heat and cook each patty for 3–4 minutes per side, until browned and cooked through.
  9. Remove and set aside.
  10. Assemble the Patty Melts
  11. Butter one side of each slice of bread.
  12. Place buttered side down in a skillet.
  13. Add:

1 slice of Swiss cheese

1 cooked beef patty

A generous spoonful of caramelized onions

Another slice of cheese

  1. Top with another slice of bread, buttered side up.
  2. Grill the Sandwich
  3. Cook over medium heat for 2–3 minutes per side, pressing gently with a spatula.
  4. Grill until the bread is golden brown and the cheese is fully melted.

Serve

Slice in half and enjoy hot with fries, pickles, or a dipping sauce like Thousand Island or garlic mayo.

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