Experience the perfection of the gourmet burger of Smashburger’s most indulgent creation right in your kitchen. This Truffle Mushroom Swiss Burger combines the restaurant’s signature smash technique with luxurious truffle mayonnaise, creating a double-stacked masterpiece that rivals any high-end steakhouse. The secret lies in the proper smashing technique that creates maximum surface area for browning while sealing in juices, resulting in the perfect balance of crispy edges and tender centers.
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Table of Contents
Why This Recipe Works
The genius of Smash Burgers lies in the Maillard reaction, the chemical process that creates those irresistible, crispy, caramelized edges. Piercing ground beef onto a hot cooking surface maximizes contact area and creates more browning than traditional thick patties. The high fat content of ground chuck (around 20%) provides the perfect balance of flavor and juiciness. Combined with earthy truffle oil, nutty Swiss cheese, and perfectly sautéed mushrooms, each component enhances the others to create a truly restaurant-quality experience.
Recipe Ingredients
For the Seasoning Blend:
- Kosher salt – Enhances all flavors and helps create the perfect crust on the patties
- Ground black pepper – Adds aromatic heat and complements the earthiness of mushrooms
- Seasoned salt – Provides complex flavor depth with herbs and spices
For the Truffle Mayo:
- Mayonnaise – Creates the rich, creamy base for the signature truffle flavor
- Truffle oil – Adds luxurious, earthy, mushroom-like notes that elevate the entire burger
For the Toppings:
- White onions РProvidea sweet, sharp contrast when saut̩ed to golden perfection
- Cremini mushrooms – Offer a meaty texture and umami depth that pairs beautifully with Swiss cheese
- Butter – Creates a rich browning medium for vegetables and adds flavor complexity
- Swiss cheese slices – Contributes a nutty, mild flavor that melts perfectly over hot patties
For the Burgers:
- Ground beef chuck – Essential 20% fat content ensures juicy, flavorful patties that hold together
- Hamburger buns – Egg buns preferred for their rich texture and ability to hold up to juices
How to Make Mushroom Swiss Burger with Truffle Mayo
- Combine salt, pepper, and seasoning to make a seasoning mix for the burgers, mushrooms, and onions.
- Prepare the truffle mayonnaise by mixing together the mayo and truffle oil.
- Cook the mushrooms and onions in butter until they are softened and slightly browned. Season them while they are cooking.
- Divide the ground beef into 8 equal portions and use your hands to press them into balls.
- Cook the beef balls by smashing them into a hot skillet and seasoning them while cooking.
- Flip over the burger patties in the skillet, season them again, and top them with Swiss cheese.
- Spread truffle mayonnaise on top and bottom buns.
- Build the burger by placing a burger with cheese on the bottom bun, then mushrooms and onions, another burger with cheese, more mushrooms and onions, and finally the top bun.
How to Make Smashed Burgers
To smash the burgers onto the grill or skillet, you may want to wrap a large can or brick with foil or use another skillet to smash the burgers into the grill.
You can also use two spatulas and press the meat onto the grill.
I like to cook these burgers in a cast-iron skillet. Iron skillets are ideal for browning meat, as they conduct heat well.
These burgers will cook rapidly. They will cook in just about 2 or 3 minutes.
I know you are going to love this burger as much as I do. You only need a few key ingredients to make one of the best hamburgers at home.
More Smashburger Copycat Recipes
Love burgers? Try these recipes!
- Backyard Burger
- Big Mac
- Culver’s Butter Burgers
- Double Cheeseburger
- Patty Melt
- Quarter Pounder
- Quesadilla Burger
- Steak and Shake Garlic Burger
- Whopper
Check out my easy burger recipes and the best fast food recipes here on CopyKat!
Smashburger Truffle Mushroom Swiss Burger Copycat
Ingredients
Burger Seasoning
- 2 teaspoons kosher salt
- 2 teaspoons ground black pepper
- 2 teaspoons seasoned salt
Truffle Mayonnaise
- 1/2 teaspoon truffle oil
- 1 cup mayonnaise
Grilled Mushrooms and Onions
- 1 cup sliced white onions
- 2 cups sliced Cremini mushrooms
- 1 1/2 tablespoons butter
Burger
- 2 1/2 pounds ground chuck
- 8 slices Swiss Cheese
- 4 hamburger buns (use egg buns if available)
Instructions
- Prepare the burger seasoning by combining the kosher salt, black pepper, and the seasoned salt in a small container. You will use the burger seasoning for both the burgers and the mushrooms and onions.
- Prepare the truffle mayonnaise by combining the truffle oil and mayonnaise in a small container and set aside. You will have some left over. You may want to dip your fries in the extra mayonnaise.
- Divide the ground meat into 8 equal portions of beef. Press the beef into round balls.
- Prepare the mushrooms and onions by heating up the skillet to medium-high. Add butter, when the butter has melted sear the mushrooms and onions. Season the mushrooms and onions with a pinch or two of the burger seasoning. Cook the mushrooms and onions by flipping occasionally and when they have begun to brown remove from the pan and set aside.
- Do not wipe out the skillet. Place 3 or 4 balls of beef (depends on the size of your skillet), and smash the burger into the hot skillet. You can mash with a wrapped large can, or two spatulas (press one over the other one). When the burger patty is flattened, season liberally with burger seasoning. The burger will hiss and sizzle while cooking, after about a minute or so you will want to flip over the burger patty. Top the patty with some additional seasoning and then the swiss cheese, cook for another 30 seconds or so and you will need to remove the patty from the grill.
- Build the burger by spreading truffle mayonnaise onto both the top and bottom buns. Add the burger with cheese, then some of the mushrooms and onions, then the other burger with cheese, and top that with additional mushrooms and onions. Add the top bun.
Just can’t get over the calorie count! Add fries and???
It’s hard to find low calorie burgers.
Thank you. This turned out amazing!!! Easily a new favorite in my house!!! My boyfriend said it was better than the original! 😊
This turned out amazing!!! Easily a new favorite in my house!!! My boyfriend said it was better than the original! 😊😋
I love the chipoltes buns. I eould like to make a batch a home if you might have a recipe for Chipotle bread
My husband loves mushrooms, I know he will love this burger.
Oh. My. God. This must be soooo delicious! I like the addition of mushrooms too, I simply love them! Thank you for the recipe!
I think the salt is completely dependent upon what you use, you could use unsalted butter, skip th cheese, and skip the burger seasoning.
I suppose I shouldn’t even ask the sodium content. Yikes!