Patty Melts with Secret Sauce

Patty Melt: an iconic diner classic often described as a melding of grilled cheese and a cheeseburger. In its purest form, it features a juicy ground beef patty, melted Swiss cheese, and deeply caramelized onions, sandwiched between slices of rye bread—which are griddled until golden and crispy. But in this version, a tangy secret sauce elevates the whole experience.

The secret sauce—a dreamy blend of mayo, ketchup, mustard, pickles or relish, and spices—is reminiscent of classic burger dressings. It adds brightness, creaminess, and a nostalgic tang that transforms a simple sandwich into all-out comfort food indulgence.

Let’s build the perfect patty melt—layered, sauced, and satisfying.

Why You’ll Love It

• Combines juicy, savory beef with melty cheese and sweet caramelized onions
• Secret sauce adds a rich, tangy kick that’s crave-worthy
• Crispy bread meets oozy, gooey filling in every bite
• Easy to personalize—swap cheeses, sauces, or bread to suit your taste
• Quick to prep and perfect for any time you’re craving warm comfort

Ingredients (Makes ~4 Sandwiches)

For the Patties:

• 1 lb ground beef (80/20 recommended)
• 1 tsp Worcestershire sauce
• ½ 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 preferred)
• 8 slices Swiss cheese (or cheddar)
• 2 Tbsp softened butter (for grilling)

Instructions

1. Caramelize the Onions
In a skillet over medium heat, melt butter and olive oil. Add onions with a pinch of salt. Cook, stirring often, until golden and caramelized—about 12–15 minutes. Remove and set aside.

2. Mix & Cook Patties
Combine ground beef with Worcestershire, garlic powder, onion powder, paprika, salt, and pepper. Divide into 4 thin patties sized to match your bread. Cook in the same skillet over medium-high heat for 3–4 minutes per side, until browned and cooked through. Set aside.

3. Make the Secret Sauce
In a small bowl, whisk together mayonnaise, ketchup, mustard, pickles, smoked paprika, and garlic powder. Stir until smooth and set aside.

4. Assemble the Sandwiches
Spread butter on one side of each bread slice. On the unbuttered side, build the layers:

• Bread
• Cheese
• Beef patty
• Caramelized onions
• Secret sauce
• Cheese
• Bread

5. Grill to Golden Perfection
Heat a skillet or griddle over medium heat. Grill sandwiches 2–3 minutes per side until the bread is crispy and golden, and the cheese has melted—press gently with a spatula to meld.

6. Serve Hot
Slice each sandwich in half and serve immediately while gooey and warm.

Chef’s Tips

• Ensure onions are deep golden for the sweetest flavor—tiny flick of heat goes a long way
• Mayo on bread (instead of butter) can boost browning and flavor, diner-style
• Thin patties layer better and melt faster, making every bite cohesive

Storage Tips

• Store leftover patties, onions, and sauce separately in the fridge for up to 3 days
• Reheat sandwiches gently in a skillet or toaster oven for best texture
• Sauce keeps well for dipping fries, burgers, or even onion rings

Final Thoughts

This Patty Melt with Secret Sauce delivers nostalgia and hearty satisfaction in one sandwich. The blend of caramelized onions, melty cheese, savory beef, and tangy sauce guarantees every bite is unforgettable. Whether it’s a cozy weeknight dinner or a show-stopping brunch, this is comfort food at its finest.

Print Pin

Patty Melts with Secret Sauce

Diner-style patty melts with caramelized onions, melted cheese, and tangy secret sauce—all stacked on grilled rye bread.

Course Breakfast, Brunch, Lunch, Snack

Cuisine American

Keyword Patty Melts with Secret Sauce

Prep Time 15 minutes minutes

Cook Time 20 minutes minutes

Total Time 35 minutes minutes

Servings 4

Ingredients

For the Patties:

• 1  lb ground beef 80/20 recommended
• 1  tsp Worcestershire sauce
• ½  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 preferred
• 8 slices Swiss cheese or cheddar
• 2  Tbsp softened butter for grilling

Instructions

Caramelize the Onions

• In a skillet over medium heat, melt butter and olive oil. Add onions with a pinch of salt. Cook, stirring often, until golden and caramelized—about 12–15 minutes. Remove and set aside.

Mix & Cook Patties

• Combine ground beef with Worcestershire, garlic powder, onion powder, paprika, salt, and pepper. Divide into 4 thin patties sized to match your bread. Cook in the same skillet over medium-high heat for 3–4 minutes per side, until browned and cooked through. Set aside.

Make the Secret Sauce

• In a small bowl, whisk together mayonnaise, ketchup, mustard, pickles, smoked paprika, and garlic powder. Stir until smooth and set aside.

Assemble the Sandwiches

Spread butter on one side of each bread slice. On the unbuttered side, build the layers:

• Bread
• Cheese
• Beef patty
• Caramelized onions
• Secret sauce
• Cheese
• Bread

Grill to Golden Perfection

• Heat a skillet or griddle over medium heat. Grill sandwiches 2–3 minutes per side until the bread is crispy and golden, and the cheese has melted—press gently with a spatula to meld.

Serve Hot

• Slice each sandwich in half and serve immediately while gooey and warm.