Mushrooms and Onions Swiss Smashed Burgers

smash burger

If you are a fan of mushrooms and onions plus the Swiss cheese, then this recipe is for you! The crispy crust, the sweetness from the onions and the earthiness from the mushrooms just goes well.

smash burger

Mushrooms and Onions Swiss Smashed Burgers

Print Recipe
Difficulty: Easy
Course Appetizer
Cuisine American
Keyword easy smash burger, mushroom and swiss, smash burgers, swiss smash burgers
Total Time 35 minutes
Servings 3


  • 1 lb 80/20 ground chuck 
  • 1 lb baby Bella mushrooms 
  • 1 medium sweet onion 
  • 4 Swiss cheese 
  • 4 pretzel buns 


  • Start off by preheating the loco cookers griddle to 350 degrees.
  • Let’s slice up the onions as thin as possible and the mushrooms. Now add about 1 tbsp of cooking oil to the griddle and sauté the mushrooms and onions until tender.
  • Remove them and now make 4 equal size meatballs with the 1Lb ground chuck, about 4 oz meatballs.
  • Turn your griddle on sear mode. Now lay down the meatballs on the griddle and use 2 spatulas to smash them as thin as possible. Season those up with salt and pepper.
  • Once you see the top of the burgers watery, it’s time to flip them. Once you flip them, season once more with salt and pepper.
  • After 1 minute, top the burgers with mushrooms and onions, then add a slice of Swiss cheese.
  • After 1 minute, top the burgers with mushrooms and onions. Add a slice of Swiss cheese, let it melt and now it’s time to assemble. On a toasted pretzel bun add your burger, crown with the top bun. 
Did you enjoy this mushroom and onions Swiss smash burger recipe? You’ll love my other beef recipes in the link below!

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