Smashburger Grilled Cheese

By Tyla | Last modified on Apr 25, 2026

Featured in: Dinner

Experience the ultimate backyard indulgence with Smashburger Grilled Cheese, a mouthwatering take on the classic smash burger technique fused with creamy, melty cheese. The key to these burgers is pressing perfectly seasoned 80/20 ground chuck onto a hot griddle to achieve irresistible crispy edges and a juicy, flavorful center.

Paired with an unforgettable smoky Baconnaise sauce featuring crispy bacon, tangy vinegar, and a hint of spice, each bite delivers rich layers of flavor and satisfying texture. Whether you’re firing up the grill for a weekend dinner, game day, or a special BBQ, this recipe will elevate your burger game effortlessly.

Why You’ll Love This Recipe

The smash burger technique creates ultra-crispy, caramelized edges and juicy centers for unbeatable texture.
Baconnaise sauce adds smoky richness and bold flavor that enhances every bite.
Layered flavors of caramelized onions, mustard-seared patties, and pepper jack cheese bring complexity without fuss.
Perfectly toasted buns add crunch and hold up to juicy patties and sauce.

Ingredients

Ground chuck (80/20): Use 2 pounds with a balanced fat ratio to ensure juicy, flavorful patties with perfect caramelized edges.
White onions: Thinly sliced, preferably with a mandoline, to layer sweetness and caramelization under each patty.
Bacon: 1/2 pound cooked crispy and chopped; adds smokiness both in the sauce and as a topping.
Salt, pepper, garlic powder: Seasonings that build savory depth and enhance the natural beef flavor.
Mustard: Brushed on just before flipping to introduce a tangy caramelized crust on the burger.
Pepper jack cheese: Sliced for melting atop patties, providing a subtle spicy kick and excellent meltability.
Burger buns: Toasted to add crunch and hold moisture from the sauce and juices.
Avocado oil: Used for griddle cooking, it withstands high heat without smoking or flavor interference.
Mayonnaise: 1/2 cup serves as the creamy base of the Baconnaise sauce, balancing flavors and moisture.
Ketchup: 2 tablespoons add subtle sweetness and tang to the sauce.
Mustard (for sauce): 2 tablespoons contribute zest and complexity to Baconnaise.
Worcestershire sauce: 1 tablespoon brings umami richness enhancing the bacon flavors.
Apple cider vinegar: 1 tablespoon gives Baconnaise a bright tang to cut through richness.
All-purpose rub: 1 tablespoon of salt, pepper, and garlic mix to season the sauce and reinforce flavor layers.
Red pepper flakes: 1 tablespoon adds subtle heat to the creamy Baconnaise.

Instructions

Form and Chill the Patties: Divide the ground chuck into 1/3 pound balls and refrigerate for 30 minutes. This chilling firms up the meat, making it easier to smash and helping the patties hold their shape on the griddle.
Prepare the Onions: Thinly slice the white onions using a mandoline for even, delicate slices. Blot them dry with paper towels to remove excess moisture, then refrigerate to keep them crisp for pressing into the burger.
Make the Baconnaise Sauce: In a bowl, combine mayonnaise, ketchup, mustard, Worcestershire sauce, apple cider vinegar, all-purpose rub, red pepper flakes, and half the crispy chopped bacon. Stir until smooth and chill for flavors to meld and intensify.
Cook Bacon for Topping: Cook remaining bacon until crispy in a pan, then chop finely. Reserve half for the sauce and half as a crunchy burger topping to add smoky texture layers.
Preheat and Oil the Griddle: Heat your griddle to medium-high and brush it lightly with avocado oil. This high-smoke point oil prevents sticking and allows a golden crust to form on the patties.
Smash the Burgers with Onions: Place each chilled meatball on the hot griddle and top each with a generous pile of sliced onions. Using a burger press, firmly smash them down to create a thin patty—this maximizes contact for a flavorful crust. Season immediately with salt, pepper, and garlic powder.
Flip and Add Cheese: After 3–4 minutes of cooking, brush a thin layer of mustard on each patty for tangy caramelization. Flip the patties carefully, add a slice of pepper jack cheese on top, and cook another 3 minutes until the cheese is beautifully melted.
Toast the Buns: While the burgers finish, toast the buns cut side down on the griddle to achieve a lightly crisp surface that prevents sogginess and adds delicious texture contrast.
Assemble the Smashburger Grilled Cheese: Spread a generous amount of Baconnaise sauce on the bottom bun, stack two cheese-topped patties, sprinkle extra crispy bacon bits on top, add more sauce if desired, and finish with the top bun. Serve immediately while hot.

You Must Know

The Baconnaise sauce is the secret to adding bold, smoky, and tangy flavor that complements the juicy beef perfectly.
80/20 ground chuck is essential for proper fat content to keep patties juicy under high heat and quick smashing.
Brushing mustard on patties before flipping creates a caramelized crust flavor uniquely enhancing the burger.
Toasting buns on the griddle adds a subtle crunch and firmness to hold up to moist ingredients.

Storage Tips

Store leftover patties and bacon sauce separately in airtight containers in the fridge for up to 3 days. Reheat patties gently in a skillet to preserve juiciness and re-toast buns before assembling leftovers.

Serving Suggestions

Pair Smashburger Grilled Cheese with crispy crinkle fries, sweet potato wedges, or a fresh crunchy coleslaw for balanced flavors and textures. For beverages, serve with lemon iced tea or a hoppy pale ale to cut through the richness.

Professional Tips

Use a heavy burger press or sturdy spatula to firmly smash the patties and maximize crust formation.
Keep onions thin and dry to caramelize properly without steaming under the patty.
Allow Baconnaise flavors to meld by chilling it at least 30 minutes before serving for a more harmonious sauce.
Experiment with single patties or substitute turkey for a lighter variation without losing flavor complexity.

FAQs

Can I make the Baconnaise sauce ahead of time?: Yes, Baconnaise can be prepared a day in advance and refrigerated, which helps the flavors deepen and blend wonderfully.
Why is 80/20 ground chuck recommended?: The 80/20 ratio offers the optimal fat content to keep burgers juicy and create crisp edges during high-heat smashing without becoming greasy.
Can I use another cheese instead of pepper jack?: Absolutely! Cheddar, American, or Monterey Jack are great alternatives, though pepper jack adds a subtle spicy note that complements the sauce well.
How do I prevent soggy buns?: Toasting buns on the griddle creates a barrier that prevents moisture from soaking in and gives a pleasant crunch to each bite.
Can I cook these burgers indoors?: Yes, use a heavy skillet or cast iron griddle on the stove top heated to medium-high. Press firmly with a spatula to replicate the smash technique.
Is it possible to customize this recipe for dietary needs?: Yes, substitute turkey or chicken for leaner protein, use low-fat mayo for the sauce, or replace buns with lettuce wraps for lower carbs.
What sides pair best with Smashburger Grilled Cheese?: Classic sides like fries, coleslaw, grilled corn, or a crisp salad perfectly complement the rich burger flavors.