KFC on Wednesday announced it's bringing back its fabled Double Down sandwich. Long the king of over-the-top fast food, this artery clogger consists of bacon, cheese and special sauce served between two pieces of fried chicken instead of a bun. Take a look at some of the other outrageous fast food items that have appeared on menus.
Taco Bell Waffle Taco -- This breakfast option features a sausage patty and scrambled eggs folded into a waffle. It also comes with a packet of syrup.
Dunkin Donuts Breakfast Sandwich -- Of course a doughnut shop would have to incorporate its signature food into a sandwich. The Dunkin Donuts Breakfast Sandwich consists of a fried egg and bacon inside a split glazed donut.
T Rex Burger -- Only offered at a Wendy's in Canada, this nine-patty behemoth will cost you $21.99 in Brandon, Manitoba.
Burger King Bacon Sundae -- Last summer, Burger King released its bacon sundae to mixed reviews, though most were positive. It's vanilla soft serve topped with chocolate fudge, caramel sauce and thick hardwood smoked bacon.
Burger King Meat'normous Omelet Sandwich -- Two eggs, two slices of American cheese, a sausage patty, two slices of ham and three slices of bacon on a toasted sesame seed bun.
Carl's Jr. Breakfast Burger -- This 830 calorie day-starter sqeezes eggs, a hamburger patty, cheese, bacon and hashbrowns between a bun.
Denny's Fried Cheese Melt Sandwich -- A grilled cheese sandwich with mozzerella sticks baked into the cheese.
Domino's Bread Bowl Pasta -- Five flavors of pasta housed in one carbalicious bread bowl. Alas, they are no longer available.
Dunkin Donuts Kolaches -- Only sold in Texas, these are kind of like pigs in a blanket -- soft, sweet yeasty rolls stuffed with a cheese sausage link.
Friendly's Grilled Cheese Cheeseburger -- This cheeseburger is sandwiched between two grilled cheese sandwiches -- one at each end.
Hardee's Monster Biscuit -- Two slices of American cheese, sausage, ham, bacon and a folded egg between two biscuits.
IHOP Pancake Stackers -- A sandwich of pancakes with cheesecake in between and topped with fruit and whipped cream. No longer available.
In n Out Burger 100x100 Burger -- This is a secret menu item, but you can get it if you ask for 100 beef patties smothered with 100 slices of cheese. It runs about -- you guessed it -- $100.
McDonald's McGriddle -- This much-loved breakfast sandwich features meat, egg, and cheese sandwiched by maple syrup-infused pancakes.
Pizza Hut Crown Crust Pizza -- Available only at Pizza Huts in the Middle East, it features a vaguely crown-shaped crust studded with "cheeseburger gems," topped with lettuce and tomato, and drizzled with "special sauce."
Pizza Hut Hot Dog Stuffed Crust Pizza -- Previously only available in the U.K., Pizza Hut's hot dog stuffed crust pizza is now also available in parts of Canada.
Wendy's Baconator Triple -- Between the bun lie three ground beef patties, three cheese slices and nine strips of smoked bacon, plus a variety of toppings and condiments.
Krispy Kreme Sloppy Joe Sandwich -- This heart attack on a platter packs ground beef and cheese in a glazed donut bun. It was offered by Chicken Charlie's at the San Diego County Fair in 2013.