This incredibly flavorful Mushroom Swiss Burger is made on the griddle and tastes incredible! Very flexible, so switch things up to fit your family's preferecnes!
Gently form your patties. This makes 6 - 1/2 pound patties, or 12 - 1/4 pound patties if you want double cheeseburgers. Season all the patties on both sides with your SPG.
Put the seasoned patties onto your preheated griddle. Next add the butter to another part of the griddle and put your sliced mushrooms down in a single layer. Brown the mushrooms on both sides, and then scootch them into a pile.
Flip the burgers once they have developed a nice crust on the one side. Let brown and finish cooking on the second side. Top with cheese.
Add the garlic to the mushrooms and and sauté. Finish the mushrooms by adding the worcestershire and A1 and stirring. Add the mushrooms on top of the cheese.
Top the mushrooms with another slice of swiss cheese, and turn the griddle down to low. Cover, and let the cheese melt over the mushrooms.
Toast the buns while all this is happening by spreading on a light coat of mayo and then toasting on the griddle.