If you love juicy burgers and crispy grilled cheese sandwiches, this homemade Patty Melt combines the best of both. Featuring seasoned beef patties, sweet caramelized onions, melted Cheddar cheese, and a creamy homemade secret sauce layered between buttery toasted sourdough bread, this diner-style favorite is loaded with flavor in every bite.
Perfect for lunch, dinner, or a satisfying weekend meal, this easy recipe delivers crispy bread, tender beef, and gooey cheese that everyone will love.
Why You'll Love This Recipe
- Juicy, flavorful beef patties.
- Sweet caramelized onions add incredible flavor.
- Crispy, buttery sourdough bread.
- Rich homemade secret sauce.
- Ready in about an hour with simple ingredients.
Ingredients
For the Patty Melts
- 1½ pounds ground beef
- 2 teaspoons Worcestershire sauce
- 1 teaspoon kosher salt
- ½ teaspoon ground black pepper
- 12 slices sourdough bread
- ½ cup prepared Secret Sauce
- 3 medium Vidalia onions, thinly sliced
- 6 slices Cheddar cheese
- 8 tablespoons unsalted butter
For the Secret Sauce
- ¼ cup Dijon mustard
- ¼ cup mayonnaise
- 1 tablespoon barbecue sauce
- ½ teaspoon hot sauce
Instructions
- Prepare the secret sauce by combining the Dijon mustard, mayonnaise, barbecue sauce, and hot sauce in a small bowl. Mix until smooth, cover, and refrigerate until ready to use.
- In a large mixing bowl, combine the ground beef, Worcestershire sauce, kosher salt, and black pepper. Mix gently and divide into six equal portions. Shape each portion into an oval patty slightly larger than the bread slices.
- Heat a medium cast-iron skillet over medium heat. Melt 2 tablespoons of butter, then add the sliced onions. Cook, stirring occasionally, for about 30–35 minutes until the onions become soft, deeply golden, and caramelized. Transfer to a plate.
- Using a large skillet or griddle over medium-high heat, cook the beef patties for about 2–3 minutes per side, or until nicely browned and cooked to your preferred doneness. Remove the patties from the skillet and carefully wipe out any excess grease.
- Spread about 1 tablespoon of the secret sauce onto one slice of sourdough bread. Top with a generous spoonful of caramelized onions, one slice of Cheddar cheese, one cooked beef patty, another tablespoon of sauce, and finish with a second slice of bread.
- Repeat the assembly process with the remaining bread, sauce, onions, cheese, and patties.
- Return the skillet to medium heat and melt 2 tablespoons of butter. Place the sandwiches into the skillet, working in batches if necessary.
- Cook each sandwich for about 3 minutes per side, adding more butter as needed, until the bread is golden brown and crispy and the cheese has completely melted.
- Serve immediately while hot with French fries, potato chips, coleslaw, pickles, or your favorite dipping sauce.
Storage Tips
Store leftover patties and caramelized onions separately in airtight containers in the refrigerator for up to 3 days. Assemble and grill fresh sandwiches when ready to serve for the best texture. The secret sauce can also be refrigerated for up to 3 days.
Recipe Tips
- Use freshly shredded Cheddar for an even creamier melt.
- Cook the onions slowly over medium heat to develop their natural sweetness.
- A cast-iron skillet creates the crispiest, most evenly toasted bread.
- Avoid pressing down on the sandwiches while cooking to keep the patties juicy.
- Serve immediately for the perfect combination of crispy bread and melted cheese.