1-First Step: Preparation and Mise en Place
Begin by prepping all your ingredients to save time. I slice the yellow onion and mushrooms, then mince the garlic cloves. This mushroom Swiss burger comes together quickly, so having everything ready helps avoid rushing and ensures even cooking.

2-Second Step: Sauté the Vegetables
Heat 4 tablespoons of olive or avocado oil in a skillet over medium heat. Add the sliced onion and mushrooms, cooking for about 5 minutes until they soften. I stir in the minced garlic cloves next, letting it cook for another minute to release its aroma. This step builds the flavorful base for your mushroom Swiss burger.

3-Third Step: Cook the Beef Patties
In another pan, form the 2 pounds of ground beef into 4 patties. Season them with coarse salt and freshly cracked pepper. I sear them over medium-high heat for 3-4 minutes per side until they reach 160°F inside. For added variety, you could adapt this for a grilled version if you prefer. Here’s where our grilled chicken recipe inspires a smoky twist, but stick to beef for the classic mushroom Swiss burger effect.

4-Fourth Step: Add Cheese and Assemble
Once the patties are nearly done, place 4 slices of Swiss cheese on top and cover the pan to let it melt, about 1 minute. If you want to double the cheese, go ahead for extra gooeyness. Meanwhile, toast the 4 hamburger buns with a touch of the unsalted butter if desired. I find this makes the mushroom Swiss burger even more irresistible. For dietary tweaks, use plant-based cheese here to keep things versatile.

5-Fifth Step: Build and Serve
Layer the sautéed mushrooms and onions on the patties, then place everything on the toasted buns. Add minced fresh parsley for a fresh touch if you like. Serve immediately with 2 cups of beef stock on hand for any sauce needs. This mushroom Swiss burger pairs well with sides, and for ideas, check out this flavorful bean dish for a complementary option. I love how this final step turns simple ingredients into a meal everyone enjoys.