Ingredients
1tbspbutter
½onionsliced
4fresh mushroomssliced
1tbspbrown sugar
1lbground beef
1egg
½cupdry bread crumbs
2tbspprepared horseradish
2tbspsteak sauce
2tbspWorcestershire sauce
2clovesgarlicchopped
2tbsponiondried minced
salt and ground black pepperto taste
4slicesPepperjack cheese
6slicescooked baconcut into halves
¼cupguacamoleor to taste
Preparation
Preheat an outdoor grill for high heat and lightly oil the grate.
Melt butter in a skillet over medium-low heat. Cook and stir onion and mushrooms in melted butter for 10 to 15 minutes or until the onions are very tender and beginning to brown.
Sprinkle brown sugar over the mixture and continue cooking for 5 to 10 minutes more until the onions caramelize. Remove from the heat and set aside.
Mix ground beef, egg, bread crumbs, horseradish, steak sauce, Worcestershire sauce, garlic, dried onion, salt, and black pepper in a bowl; shape into 4 patties about 6-inch wide and ½-inch thick.
Cook burgers on preheated grill until completely browned, about 3 minutes per side. Reduce heat to medium and cook burgers another 3 minutes per side, topping each burger with a slice of pepperjack cheese for the last minute of cooking.
Top each burger with about ¼ of the mushroom and onion mixture, 3 pieces of bacon, and 1 tablespoon guacamole to serve.
