Black Angus Burger on Brioche. Build it up: Add $1 for American, Cheddar, Pepper Jack, Swiss, Blue Cheese, Mushrooms, Fried Egg, Caramelized Onions or Fried Onions. Add $2 for Guacamole, Sliced Avocado, BBQ Pork, Tex Mex Ground Beef, Corn, Black Bean Relish