Philly Cheesesteak Burgers Smashed on the Flatrock
There’s something undeniably satisfying about biting into a juicy burger that melds the flavors of a classic Philly cheesesteak. Imagine the richness of ground beef, the sweetness of sautéed onions and peppers, and a gooey slice of cheddar—all nestled in a perfectly toasted bun. These Philly Cheesesteak Burgers Smashed on the Flatrock are not just a meal; they are an experience to behold. Whether you’re firing up the grill or using a flatrock, this recipe promises to deliver a mouthwatering dish that will have everyone coming back for seconds.
Why It’s Crowd-Pleasing

This recipe takes the beloved Philly cheesesteak and gives it a fun twist. The combination of ground beef, vibrant red peppers, and sweet onions creates a flavor explosion that is hard to resist. The technique of smashing the burgers on the flatrock seals in the juices, resulting in a crispy exterior and a succulent interior. Plus, who doesn’t love cheese melting over a hearty burger? It’s a dish that’s perfect for gatherings, barbecues, or a cozy family dinner. Get ready to impress your guests with this delicious fusion of two classics!
What You’ll Need
- 2 medium red peppers, sliced into strips
- 1 large onion, sliced into strips
- 1 tablespoon avocado oil (for sautéing)
- ½ teaspoon salt (for veggies)
- ½ teaspoon pepper (for veggies)
- 1.5 lbs ground beef (85/15% or 90/10%)
- 1 tablespoon avocado oil (for burgers)
- ½ teaspoon salt (for burgers)
- ½ teaspoon pepper (for burgers)
- 4 hamburger buns
- 1 teaspoon avocado oil (for buns)
- 4 slices cheddar cheese
What’s in the Gear List
- Flatrock or griddle – for smashing the burgers to perfection.
- Spatula – to flip and smash the burgers.
- Knife and cutting board – for slicing the vegetables.
- Skillet – for sautĂ©ing the peppers and onions.
- Meat thermometer – to ensure the burgers are cooked to your liking.
Build Philly Cheesesteak Burgers Smashed on the Flatrock Step by Step

Step 1: Prepare the Veggies
Start by heating a skillet over medium heat and adding 1 tablespoon of avocado oil. Once the oil is hot, toss in the sliced red peppers and onions. Sprinkle with ½ teaspoon salt and ½ teaspoon pepper. SautĂ© for about 5-7 minutes, or until the veggies are tender and slightly caramelized. Remove from heat and set aside.
Step 2: Form the Patties
In a large bowl, combine the ground beef with ½ teaspoon salt and ½ teaspoon pepper. Mix gently until just combined—overmixing can lead to tough burgers. Divide the beef into four equal portions and shape them into patties. Aim for a slightly larger size than the buns, as they will shrink while cooking.
Step 3: Heat the Flatrock
Heat your flatrock or griddle over medium-high heat. Drizzle 1 tablespoon of avocado oil on the surface and spread it evenly. The oil will help prevent sticking and create a beautiful crust.
Step 4: Smash the Burgers
Once the flatrock is hot, place the patties on the surface, leaving space in between each. Using a spatula, smash each patty down firmly to create a thin layer. This helps to achieve that crispy exterior. Cook for about 3-4 minutes without moving them.
Step 5: Add Cheese and Veggies
After the burgers have cooked for a few minutes, flip them over. Immediately place a slice of cheddar cheese on top of each patty, allowing it to melt while the burgers finish cooking. Add a generous scoop of the sautéed peppers and onions on top of the cheese. Cook for another 2-3 minutes, or until the burgers reach your desired doneness.
Step 6: Toast the Buns
While the burgers are finishing, drizzle 1 teaspoon of avocado oil on the cut sides of the hamburger buns. Place them on the flatrock, cut side down, for a minute or two until they are golden and crispy.
Step 7: Assemble your Burgers
To assemble, start with the bottom half of the toasted bun. Place the cheesy burger patty topped with peppers and onions, then finish with the top half of the bun. Serve immediately with your favorite sides.
Substitutions by Category

- Ground Beef: You can use ground turkey or chicken for a leaner option.
- Cheese: Swap cheddar for provolone or mozzarella for a different flavor profile.
- Buns: Use whole grain or gluten-free buns if preferred.
- Peppers: Green bell peppers can be used for a different taste.
Don’t Do This
- Don’t skip the smashing! It’s key to achieving that crispy texture.
- Avoid overcooking the burger patties to maintain juiciness.
- Don’t forget to toast the buns; it adds a delightful crunch.
- Do not overcrowd the flatrock; cook in batches if necessary.
Storage Pro Tips
Leftover Philly Cheesesteak Burgers Smashed on the Flatrock can be stored in an airtight container in the refrigerator for up to 3 days. Reheat them in a skillet for the best results, or pop them in the microwave if you’re in a hurry. The ingredients can also be prepped ahead of time; slice the veggies and form the patties a day in advance for an easy dinner option.
Common Questions
Can I make these burgers ahead of time?
Absolutely! You can prepare the patties and sautĂ© the veggies ahead of time. Just store them separately in the fridge until you’re ready to cook.
What is the best ground beef ratio for burgers?
For juicy burgers, a blend of 85/15% or 90/10% ground beef is ideal. This ratio provides enough fat to keep them moist without being overly greasy.
Can I use a grill instead of a flatrock?
Yes, grilling works beautifully! Just follow the same steps, and be sure to keep an eye on the cooking time.
What toppings can I add to these burgers?
You can customize your burgers with toppings like lettuce, tomato, pickles, or even a spicy mayo for an extra kick.
Let’s Eat
These Philly Cheesesteak Burgers Smashed on the Flatrock are a true delight. With their perfect balance of flavors and textures, they are sure to become a staple at your gatherings. The vibrant peppers and onions, combined with the savory beef and melted cheese, create a burger experience that is both comforting and indulgent. So gather your friends and family, fire up the flatrock, and enjoy a meal that’s as fun to make as it is to eat!

Philly Cheesesteak Burgers Smashed on the Flatrock
Ingredients
Equipment
Method
- Step 1: Prepare the Veggies - Heat a skillet over medium heat and add 1 tablespoon of avocado oil. Once hot, toss in the sliced red peppers and onions. Sprinkle with ½ teaspoon salt and ½ teaspoon pepper. SautĂ© for about 5-7 minutes until tender and slightly caramelized. Remove from heat and set aside.
- Step 2: Form the Patties - In a large bowl, combine ground beef with ½ teaspoon salt and ½ teaspoon pepper. Mix gently, then divide into four equal portions and shape into patties slightly larger than the buns.
- Step 3: Heat the Flatrock - Heat your flatrock or griddle over medium-high heat. Drizzle 1 tablespoon of avocado oil and spread it evenly.
- Step 4: Smash the Burgers - Place the patties on the hot flatrock, leaving space in between. Smash each patty down firmly to create a thin layer. Cook for about 3-4 minutes without moving.
- Step 5: Add Cheese and Veggies - Flip the burgers and place a slice of cheddar cheese on each patty. Add sautéed peppers and onions on top. Cook for another 2-3 minutes until done.
- Step 6: Toast the Buns - Drizzle 1 teaspoon of avocado oil on cut sides of buns. Place them cut side down on the flatrock for a minute or two until golden and crispy.
- Step 7: Assemble your Burgers - Start with the bottom half of a toasted bun. Add the cheesy burger patty topped with peppers and onions, then finish with the top half of the bun. Serve immediately.
Notes
- Feel free to swap ground beef for turkey or chicken for a leaner option.
- Try different cheeses like provolone or mozzarella for a unique twist.
- Use whole grain or gluten-free buns for a healthier alternative.
