Don’t let the name of this burger scare you — the only killer on the plate of Marble Lane’s secret "off-the-menu" burger is the taste, created from a tender beef patty topped with Comté cheese, a thick, juicy slice of tomato, avocado, and a fried egg. We liked stabbing our burgers with a knife as well because we thought it helped keep the mile-high creation together.
Season the burger patty with salt and pepper on both sides and place on the griddle. Cook to desired temperature. Top with the sliced cheese and place in the oven until the cheese melts.
Butter the cut bun and toast on the griddle. Cut the bacon in ½ and place on top of the melted cheese on the burger. Add the slice avocado and onion ring. Fill the center of the onion ring with the sautéed mushrooms and onions. Top with bibb lettuce and the top ½ of the bun. Stab a pickle spear with a steak knife and "stab" the burger with it.