It's an all-burger bash on The Kitchen as the hosts share their secrets and recipes for building better burgers. Geoffrey Zakarian makes his Iron Chef Burger, and Marcela Valladolid serves up a Tuna Burger with Chipotle Slaw. Jeff Mauro puts a flavorful spin on a Chicken Burger, and Food Network Star Aaron McCargo Jr. stops by with his Locked and Loaded Chorizo Burger. Katie Lee blends up a Blueberry Pie Milkshake to wash it all down.