Cheesy Griddled Smashburger Quesadillas (Printable)

Crispy tortillas layered with thin beef patties, melted cheese, and sweet onions, finished with punchy mayo-mustard sauce.

# What Goes In:

→ Smashburger Patties

01 - 1 pound ground beef (80/20 blend)
02 - 1 teaspoon kosher salt
03 - 0.5 teaspoon freshly ground black pepper
04 - 1 teaspoon garlic powder

→ Quesadillas

05 - 4 large flour tortillas (8-10 inches each)
06 - 8 slices sharp cheddar cheese
07 - 4 slices American cheese
08 - 1 small yellow onion, thinly sliced
09 - 2 tablespoons vegetable oil, divided
10 - 2 tablespoons unsalted butter, melted

→ Sauce

11 - 2 tablespoons mayonnaise
12 - 1 tablespoon Dijon mustard
13 - 1 teaspoon Worcestershire sauce

→ Optional Garnishes

14 - Sliced pickles
15 - Chopped fresh cilantro
16 - Salsa
17 - Sour cream

# How to Make It:

01 - In a medium bowl, gently mix ground beef with salt, pepper, and garlic powder until just combined, avoiding overworking the meat.
02 - Preheat a flat griddle or heavy skillet over medium-high heat. Add 1 tablespoon vegetable oil and spread to coat the surface.
03 - Add the sliced onion to one side of the griddle and cook, stirring occasionally, until golden and softened, about 5 minutes. Transfer onions to a plate and set aside.
04 - Divide beef mixture into 8 equal portions and roll each into a loose ball.
05 - Place 4 beef balls onto the hot griddle, spacing them evenly. Immediately press each one flat with a heavy spatula or burger press to form thin patties about 4 inches across.
06 - Cook patties undisturbed until edges are deeply browned and juices bubble up, about 2 minutes. Season tops with a pinch of salt and pepper.
07 - Flip patties, then immediately top each with 1 slice of cheddar and 1 slice of American cheese. Cook until cheese is melted and edges are crisp, about 1 minute more. Transfer patties to a plate.
08 - Wipe the griddle clean and reduce heat to medium. Brush both sides of each tortilla lightly with melted butter.
09 - Place a tortilla on the griddle. Layer 2 cheesy patties side by side, sprinkle with cooked onions, and drizzle with sauce made from whisked mayonnaise, Dijon mustard, and Worcestershire. Top with a second tortilla.
10 - Cook until the bottom tortilla is golden and crisp, about 2 minutes, pressing gently with a spatula.
11 - Flip and cook the other side until golden, about 2 minutes more.
12 - Transfer quesadilla to a cutting board and let rest for 1 minute. Slice into wedges with a sharp knife or pizza cutter.
13 - Repeat with remaining ingredients to make 2 large quesadillas in total. Serve hot with pickles, cilantro, salsa, or sour cream as desired.

# Expert Tips:

01 -
  • It combines the crispy edge magic of a smashburger with the gooey, handheld comfort of a quesadilla in one glorious bite.
  • You get double cheese, caramelized onions, and a tangy sauce that pulls everything together without feeling heavy.
  • The whole thing cooks on one griddle, so cleanup is faster than you think.
  • It tastes like diner food but feels like a secret recipe you invented yourself.
02 -
  • If you press the patties too soon after placing them on the griddle, they stick and tear, so smash them the instant they hit the hot surface.
  • Melted butter on the tortillas makes them golden and crispy, but too much will make them greasy and soggy instead.
  • Let the quesadilla rest for a full minute before slicing or the cheese will slide right out and burn your fingers.
03 -
  • Press the patties with a flat, heavy spatula or a burger press, not your hand, so you get an even thickness and maximum crust.
  • Wipe the griddle clean between batches so burnt bits don't stick to your tortillas and ruin the crispy texture.
  • If you're making more than two quesadillas, keep the finished ones warm in a low oven while you cook the rest.
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