Cast-Iron Patty Melts Classic

Featured in: Smoky Weekend Favorites

Experience the rich flavors of juicy ground beef patties combined with sweet caramelized onions and melted Swiss cheese, all layered between buttery rye bread. This dish is prepared in a cast-iron skillet to achieve a perfect golden crust and melty interior. The cooking process involves slow-caramelizing onions, seasoning beef patties for depth, and grilling the assembled sandwiches until cheese melts beautifully. Ideal for a comforting main dish served hot and fresh.

Updated on Mon, 24 Nov 2025 10:50:00 GMT
Golden-brown cast-iron patty melts with melted Swiss cheese, juicy beef, and sweet caramelized onions. Pin it
Golden-brown cast-iron patty melts with melted Swiss cheese, juicy beef, and sweet caramelized onions. | emberthyme.com

A classic diner favorite featuring juicy beef patties, caramelized onions, and gooey melted cheese sandwiched between crispy, buttery rye bread&all cooked to perfection in a cast-iron skillet.

I first served this to my family and they loved the rich flavors and crispy texture it offers every time.

Ingredients

  • For the Onions: 2 large yellow onions, thinly sliced 2 tablespoons unsalted butter 1 tablespoon olive oil 1/2 teaspoon kosher salt 1/4 teaspoon freshly ground black pepper
  • For the Patties: 1 lb (450 g) ground beef (80/20 blend preferred) 1 teaspoon Worcestershire sauce 1/2 teaspoon garlic powder 1/2 teaspoon kosher salt 1/4 teaspoon freshly ground black pepper
  • For Assembly: 8 slices rye bread 8 slices Swiss cheese 4 tablespoons unsalted butter, softened

Instructions

Caramelize the onions:
In a large cast-iron skillet over medium heat, melt 2 tablespoons butter with olive oil. Add sliced onions, season with salt and pepper, and cook, stirring occasionally, until deep golden brown and softened, about 20 minutes. Transfer onions to a bowl and wipe skillet clean.
Prepare the patties:
In a bowl, gently mix ground beef with Worcestershire sauce, garlic powder, salt, and pepper. Form into 4 thin, oval patties roughly the size of your bread slices.
Cook the patties:
Heat the cleaned skillet over medium-high heat. Add patties and cook 2–3 minutes per side until well browned and just cooked through. Remove from skillet and set aside.
Assemble the sandwiches:
Butter one side of each slice of rye bread. Place 4 slices, buttered side down, on a cutting board. Top each with 1 slice of Swiss cheese, a beef patty, a generous spoonful of caramelized onions, another slice of Swiss cheese, and finish with a second slice of bread, buttered side up.
Grill the melts:
Return skillet to medium heat. Place sandwiches in the skillet (in batches if needed), pressing gently. Cook 3–4 minutes per side, until bread is golden brown and cheese is melted. Add more butter to the skillet if necessary.
Serve immediately:
Cut in halves or quarters.
Crispy rye bread surrounding a warm, cheesy cast-iron patty melt freshly made in a skillet. Pin it
Crispy rye bread surrounding a warm, cheesy cast-iron patty melt freshly made in a skillet. | emberthyme.com

This recipe always brings the family together as we gather around the table enjoying these hearty melts on a cozy evening.

Notes

For extra flavor, try adding a dollop of Dijon mustard or a few slices of pickled jalapeños before grilling. Swap Swiss cheese for cheddar or provolone if desired. Serve with classic diner sides like potato chips, fries, or a simple salad. Rye bread can be substituted with sourdough for a different twist.

Required Tools

Cast-iron skillet Mixing bowl Spatula Knife and cutting board

Allergen Information

Contains Wheat (bread) Dairy (cheese, butter) Beef present May contain traces of soy (Worcestershire sauce) Always check ingredient labels for potential allergens.

Savory cast-iron patty melts, perfect for a cozy dinner, featuring flavorful beef and melted cheese. Pin it
Savory cast-iron patty melts, perfect for a cozy dinner, featuring flavorful beef and melted cheese. | emberthyme.com

These patty melts combine great flavors and textures to create an unforgettable meal each time.

Recipe FAQs

How do I caramelize onions perfectly?

Cook sliced onions slowly in butter and olive oil over medium heat, stirring occasionally until they turn deep golden and soft, about 20 minutes.

What type of beef is best for the patties?

Use an 80/20 ground beef blend to ensure a juicy patty with the right fat content.

Can I substitute Swiss cheese with other types?

Yes, cheddar or provolone work well and add different flavor notes.

What bread works best for these melts?

Buttery rye bread is traditional, but sourdough can be used for a nice twist.

How do I prevent the bread from getting soggy?

Butter the bread well and grill in a hot cast-iron skillet to achieve a crisp, golden crust.

Cast-Iron Patty Melts Classic

Buttery rye with savory beef, Swiss cheese, and caramelized onions cooked to golden perfection.

Time to Prep
15 mins
Time to Cook
30 mins
Overall Time
45 mins
By Ember Thyme Clara Henshaw


Skill Level Easy

Cuisine American

Portions 4 Portion Size

Dietary Details None specified

What You’ll Need

Onions

01 2 large yellow onions, thinly sliced
02 2 tablespoons unsalted butter
03 1 tablespoon olive oil
04 1/2 teaspoon kosher salt
05 1/4 teaspoon freshly ground black pepper

Patties

01 1 lb ground beef (80/20 blend preferred)
02 1 teaspoon Worcestershire sauce
03 1/2 teaspoon garlic powder
04 1/2 teaspoon kosher salt
05 1/4 teaspoon freshly ground black pepper

Assembly

01 8 slices rye bread
02 8 slices Swiss cheese
03 4 tablespoons unsalted butter, softened

How To Make

Step 01

Caramelize Onions: Melt butter with olive oil in a large cast-iron skillet over medium heat. Add sliced onions, season with salt and pepper, and cook while stirring occasionally until deep golden brown and softened, approximately 20 minutes. Transfer onions to a bowl and wipe skillet clean.

Step 02

Form Patties: In a bowl, combine ground beef with Worcestershire sauce, garlic powder, salt, and pepper. Gently mix and shape into 4 thin, oval patties about the size of the bread slices.

Step 03

Cook Patties: Heat the cleaned skillet over medium-high heat. Cook patties 2 to 3 minutes per side until well browned and just cooked through. Remove from skillet and set aside.

Step 04

Assemble Sandwiches: Butter one side of each bread slice. On a flat surface, place 4 slices buttered side down. Layer each with 1 slice Swiss cheese, a beef patty, a generous spoonful of caramelized onions, another slice of Swiss cheese, then top with the remaining bread slices, buttered side up.

Step 05

Grill Sandwiches: Return skillet to medium heat. Place sandwiches in the skillet, pressing gently. Cook 3 to 4 minutes per side until bread is golden brown and cheese is melted, adding more butter if needed.

Step 06

Serve: Cut sandwiches in halves or quarters and serve immediately.

Equipment Needed

  • Cast-iron skillet
  • Mixing bowl
  • Spatula
  • Knife and cutting board

Allergy Info

Review every ingredient for allergens and talk to your healthcare provider if you’re unsure.
  • Contains wheat (bread) and dairy (cheese, butter)
  • Contains beef
  • May contain traces of soy (Worcestershire sauce)

Nutrition Details (for each portion)

This nutritional info is just for reference—always consult your healthcare provider for specific advice.
  • Calorie Count: 680
  • Fats: 39 g
  • Carbohydrates: 44 g
  • Proteins: 37 g