This burger is a gourmet treat, featuring grilled beef patties topped with melted Swiss cheese and sautéed golden mushrooms. These components are nestled between bioche buns, enhancing the flavors and textures. This recipe is perfect for an amazing burger experience that combines simplicity with rich taste.
In a bowl, combine all the mayonnaise ingredients together. Place in the refrigerator until serving.
Add the beef to a bowl along with the steak seasoning and tsp of worchestershire sauce. Mix until combined, making sure not to overmix (see above). Shape into 4 patties and place in the refrigerator until grilling time.
For the mushrooms, add the butter and olive oil to a large skillet on the stove over medium-high heat. Once the butter has melted, add the mushrooms and worcestershire, stir to combine everything in the skillet. Cook about 5 minutes stirring ocassionally. You want the skillet to evaporate almost all the moisture.
Add in the minced garlic and black pepper to the skillet with the mushrooms. Cook for an additional minute, remove from the heat and set aside. Keep warm until serving.
Grill the beef patties on a preheated grill for 4-5 minutes per side until they reach an internal temperature of 165 degrees. Turn off the grill and add a cheese slice on top of each patty. Close the grill for a minute or 2 until the cheese melts.
Serve patties on buns with a lettuce leaf, some of the mushrooms, and some of the basil mayonnaise.