Cheesy Griddled Smashburger Quesadillas (Printable Version)

Crispy quesadillas stacked with juicy smashburger patties, melted cheese, and sweet onions, topped with zesty mayo-mustard sauce.

# What You'll Need:

→ 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

# Step-by-Step Directions:

01 - In a medium bowl, gently combine ground beef with salt, pepper, and garlic powder until just incorporated; avoid overworking the meat to maintain texture.
02 - Preheat a flat griddle or heavy skillet over medium-high heat. Add 1 tablespoon vegetable oil and spread evenly across the surface.
03 - Add sliced onion to one side of the griddle. Cook with occasional stirring until golden and tender, approximately 5 minutes. Transfer to a plate.
04 - Divide beef mixture into 8 equal portions and gently roll each into a loose ball.
05 - Place 4 beef balls onto the hot griddle with even spacing. Immediately press each flat with a heavy spatula or burger press to create thin patties approximately 4 inches across.
06 - Cook patties without moving until edges are deeply browned and juices surface, about 2 minutes. Season tops with salt and pepper.
07 - Flip patties, then immediately top each with 1 slice cheddar and 1 slice American cheese. Cook until cheese melts and edges crisp, approximately 1 minute. Transfer to a plate.
08 - Wipe 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 (whisk mayonnaise, Dijon mustard, and Worcestershire together). Top with a second tortilla.
10 - Cook bottom tortilla until golden and crisp, about 2 minutes, using gentle spatula pressure. Flip and cook other side until golden, approximately 2 minutes more.
11 - Transfer quesadilla to a cutting board and rest for 1 minute. Slice into wedges with a sharp knife or pizza cutter.
12 - Repeat assembly and cooking process with remaining ingredients to create 2 large quesadillas total. Serve hot with preferred garnishes.

# Expert Advice:

01 -
  • Every quesadilla gets crispy, golden edges that shatter under your teeth before you hit the juicy smashburger filling.
  • Two kinds of cheese melt together into a creamy, stretchy blanket that coats every bite.
  • The tangy mayo mustard sauce cuts through the richness and keeps you reaching for another wedge.
  • You can have dinner on the table in under an hour, even with a crowd to feed.
02 -
  • Do not skip the smash step; pressing the beef thin is what creates those crispy, lacy edges that make this recipe special.
  • Let the patties sear undisturbed for the full 2 minutes or the crust will not form properly and they will stick to the griddle.
  • Wipe the griddle clean before assembling the quesadillas or leftover beef bits will burn and turn bitter.
  • Reduce the heat to medium before griddling the tortillas or the butter will scorch before the inside gets warm.
03 -
  • Season the tops of the patties right before you flip them so the salt and pepper stick to the juices and form an extra flavorful crust.
  • Press the quesadilla gently with the spatula while it cooks to help the cheese meld with the tortilla and create a unified, crispy exterior.
  • Make the sauce ahead and keep it in the fridge for up to a week so you can whip up these quesadillas on a busy weeknight.
  • If your griddle is small, work in batches and keep finished quesadillas warm in the oven while you cook the rest.
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