Patty Melts with Caramelized Onions and Secret Sauce Recipe
Introduction
Patty melts are a classic comfort food combining juicy beef patties, savory caramelized onions, and melty cheese between crispy toasted bread. This version features a flavorful secret sauce that adds a tangy twist, making each bite irresistible and perfect for any meal.

Ingredients
- 1 lb (450 g) ground beef (80/20 works best)
- 1 tsp Worcestershire sauce
- 1 tsp garlic powder
- ½ tsp onion powder
- ½ tsp smoked paprika
- ½ tsp salt
- ¼ tsp black pepper
- 2 medium yellow onions, thinly sliced
- 2 tbsp unsalted butter
- 1 tsp olive oil
- Pinch of salt (for onions)
- ½ cup mayonnaise
- 2 tbsp ketchup
- 1 tbsp yellow mustard
- 1 tbsp finely diced pickles or relish
- ½ tsp smoked paprika (for sauce)
- ½ tsp garlic powder (for sauce)
- 8 slices rye bread (or sourdough if preferred)
- 8 slices Swiss cheese (or cheddar for variation)
- 2 tbsp softened butter (for spreading on bread)
Instructions
- Step 1: In a skillet, melt butter with olive oil over medium heat. Add the sliced onions and a pinch of salt. Cook, stirring often, until the onions are golden brown and caramelized, about 12–15 minutes. Remove from heat and set aside.
- Step 2: In a bowl, combine the ground beef, Worcestershire sauce, garlic powder, onion powder, smoked paprika, salt, and black pepper. Mix gently to combine without overworking the meat.
- Step 3: Divide the mixture into 4 thin patties roughly the shape of your bread slices. Cook the patties in a skillet over medium-high heat for 3–4 minutes per side until browned and cooked through. Transfer to a plate.
- Step 4: Make the secret sauce by stirring together mayonnaise, ketchup, mustard, diced pickles, smoked paprika, and garlic powder until smooth. Set aside.
- Step 5: Spread softened butter on one side of each bread slice. On the unbuttered side, layer the sandwich as follows: bread slice, a slice of cheese, a beef patty, caramelized onions, a spoonful of secret sauce, another slice of cheese, and the final bread slice, buttered side out.
- Step 6: Heat a skillet or griddle over medium heat. Cook the sandwiches for 2–3 minutes per side until the bread is golden brown and the cheese has melted. Press gently with a spatula to help the layers meld together.
- Step 7: Slice and serve warm for a satisfying meal.
Tips & Variations
- For extra flavor, add a pinch of cayenne pepper to the beef mixture for a subtle kick.
- Try swapping Swiss cheese for sharp cheddar or gruyère for different taste profiles.
- Use sourdough bread for a tangier crust or classic rye for a traditional twist.
- Make the secret sauce ahead of time to let the flavors meld and save prep time.
Storage
Store leftover patty melts wrapped tightly in foil or airtight containers in the refrigerator for up to 2 days. Reheat gently in a skillet over low heat to preserve the crispy bread and melted cheese, or use a toaster oven for best results.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use different meats for the patties?
Yes, ground turkey or chicken can be substituted, though cooking times may vary and the flavor will be lighter. Adding seasonings helps boost their taste.
How do I prevent the bread from getting soggy?
Make sure to spread butter on the outside of the bread slices before grilling, and cook over medium heat slowly to toast the bread evenly while melting the cheese without releasing too much moisture.
PrintPatty Melts with Caramelized Onions and Secret Sauce Recipe
This classic Patty Melt recipe features juicy, seasoned ground beef patties topped with sweet caramelized onions, melted Swiss cheese, and a tangy secret sauce, all sandwiched between toasted rye bread. Perfectly grilled until golden and melty, this comforting sandwich is a delicious twist on a traditional burger.
- Prep Time: 20 minutes
- Cook Time: 20 minutes
- Total Time: 40 minutes
- Yield: 4 sandwiches 1x
- Category: Sandwich
- Method: Stovetop
- Cuisine: American
Ingredients
For the Patties:
- 1 lb (450 g) ground beef (80/20 works best)
- 1 tsp Worcestershire sauce
- 1 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 you prefer)
- 8 slices Swiss cheese (or cheddar for variation)
- 2 tbsp butter (softened, for spreading on bread)
Instructions
- Make the Caramelized Onions: In a skillet, melt the unsalted butter with olive oil over medium heat. Add the thinly sliced onions and a pinch of salt. Cook, stirring often, until the onions become golden brown and caramelized, which takes about 12 to 15 minutes. Once done, remove from heat and set aside.
- Mix and Cook the Patties: In a bowl, combine ground beef with Worcestershire sauce, garlic powder, onion powder, smoked paprika, salt, and black pepper. Mix everything together gently until just combined. Divide the mixture into four thin patties roughly shaped to match the bread slices. Heat a skillet over medium-high heat and cook the patties for 3 to 4 minutes per side until they are browned and cooked through. Transfer patties to a plate and keep warm.
- Make the Secret Sauce: In a small bowl, stir together mayonnaise, ketchup, yellow mustard, finely diced pickles (or relish), smoked paprika, and garlic powder until smooth and well combined. Set aside.
- Assemble the Patty Melts: Spread softened butter on one side of each bread slice. On the unbuttered side, layer the sandwich in this order: bread slice, slice of Swiss cheese, cooked beef patty, caramelized onions, a spoonful of secret sauce, another slice of cheese, then top with the second slice of bread (buttered side out).
- Grill the Sandwiches: Heat a skillet or griddle over medium heat. Place the assembled sandwiches onto the skillet and cook for 2 to 3 minutes per side until the bread is golden brown and crisp, and the cheese is melted. Press gently with a spatula to help meld the sandwich layers together. Remove from heat and serve hot.
Notes
- Using 80/20 ground beef ensures juicy and flavorful patties.
- Rye bread provides a traditional flavor but sourdough is a great substitute for a milder taste.
- Caramelizing onions takes patience but adds a rich, sweet depth to the sandwich.
- The secret sauce can be made ahead and stored in the refrigerator for up to a week.
- Pressing the sandwich gently while grilling helps the cheese melt evenly and sandwiches to hold together.
- For variation, cheddar cheese can be used instead of Swiss.
Keywords: Patty Melt, caramelized onions, secret sauce, rye bread sandwich, beef sandwich, grilled sandwich, American comfort food

