Easy Patty Melts Recipe with Caramelized Onions and Secret Sauce Magic

There’s something truly magical about a well-made Patty Melt. The combination of juicy, seasoned beef patties, perfectly caramelized onions, gooey melted cheese, and golden, toasted bread makes it an all-time favorite. But what really sets this recipe apart is the creamy, tangy secret sauce that elevates every bite. It’s a dish that brings all the best of classic diner comfort food into your kitchen!

Photo byRecipes By Lisa

I first fell in love with Patty Melts during late-night diner runs with friends, where the comforting smell of sizzling beef and onions would fill the air. This homemade version not only brings back those memories, but it's even better when prepared fresh at home. The secret sauce adds that extra pop of flavor, making each bite unforgettable. Trust me, you’ll want to bookmark this one!

This amazing recipe was inspired by Recipes by Lisa, a fantastic page I found on Facebook. Make sure to check her page for even more delicious recipes here.

The Patty Melt: A Classic Diner Staple

Patty Melts have their roots in American diner culture, often enjoyed with a side of fries or pickles. The dish has been popular since the mid-20th century, combining elements of a hamburger and a grilled cheese sandwich. It’s a versatile comfort food that never fails to satisfy.

This particular version uses Swiss or American cheese, but you can always experiment with other cheeses for more personalized flavor. Rye bread is traditional, but sourdough also works beautifully for an added crunch.

Ingredients for Patty Melts with Secret Sauce 🍔

For the Patty Melts:

• 1 lb ground beef (80/20 for juicy patties)
• 1 large onion, thinly sliced
• 8 slices of rye or sourdough bread
• 8 slices of Swiss or American cheese
• 2 tbsp butter
• Salt and pepper to taste

For the Secret Sauce:

• 1/4 cup mayonnaise
• 1 tbsp ketchup
• 1 tbsp Dijon mustard
• 1 tbsp sweet pickle relish
• 1 tsp Worcestershire sauce
• Dash of hot sauce (optional)
• Salt and pepper to taste

How to Make These Mouthwatering Patty Melts

1. Prepare the Secret Sauce:
   In a small bowl, whisk together the mayonnaise, ketchup, Dijon mustard, sweet pickle relish, and Worcestershire sauce. If you like a little heat, add a dash of hot sauce. Season with salt and pepper to taste and set the sauce aside.
2. Caramelize the Onions:
   Melt 1 tablespoon of butter in a large skillet over medium heat. Add the thinly sliced onions and cook, stirring occasionally, until they are golden brown and caramelized, which will take about 15-20 minutes. Set the onions aside when they’re perfectly tender and sweet.
3. Cook the Beef Patties:
   Divide the ground beef into four equal portions and shape them into thin patties, just slightly larger than the size of your bread slices. Season both sides of each patty with salt and pepper. Using the same skillet, cook the patties over medium-high heat for about 3-4 minutes per side, or until browned and cooked through. Set aside.
4. Assemble the Patty Melts:
   Butter one side of each slice of bread. Spread the secret sauce on the unbuttered side. To build the sandwich, layer a slice of cheese, a beef patty, caramelized onions, another slice of cheese, and then top with another slice of bread (buttered side out).
5. Grill the Patty Melts:
   Heat the same skillet or a griddle over medium heat. Cook the assembled sandwiches for about 3-4 minutes per side, pressing down gently with a spatula to achieve that perfect golden-brown crust. Make sure the cheese is melted and gooey!
6. Serve and Enjoy:
   Slice your patty melts in half, serve with any leftover secret sauce on the side, and dig in!

Cooking Tips and Pairings

• For an extra crispy exterior, toast the bread lightly before assembling the patty melts.
• Cheese Substitutions: While Swiss and American cheeses are classic, feel free to experiment with cheddar, provolone, or even pepper jack for a spicier kick.
• Side Dish Ideas: These Patty Melts pair perfectly with French fries, onion rings, or even a crisp side salad if you’re looking for something lighter.

Whether you’re making these for a casual family dinner or a weekend treat, they’re sure to impress. And don't forget—it's all about that secret sauce!

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