Prep Time: 15 Min
For the onions: - onions - butter oil - Water - Kosher salt For the mushrooms: - butter - crimini mushrooms - garlic - Kosher salt and pepper to taste For the burgers: - ground beef - burger seasoning - swiss cheese - brioche buns - Lettuce or Arugula - Mayonnaise
Cook Time: 1 HR
Ingredients
Gently shape the beef into five equal sized balls then use the palm of your hand to press them into a flat patty shape.