Artisanal rolls, ciabatta, Hawaiian buns (which have a slightly sweet flavor profile), multigrain loaves, Texas toast, onion rolls, bagels, challah, and English muffins are trending, and bring interesting flavors, textures, and backstory to a burger. In addition, these carriers suggest a theme that can be carried through with toppings and condiments, such as arugula, prosciutto, and mozzarella with ciabatta or barbecue sauce and crispy onion strings on Texas toast.