Mcdonald's - PizzaThat's right, McDonald's actually once served a pizza. The company hoped the idea would be its next "McHit" around 1989, according to the New York Times. The item was largely considered a fail, but that hasn't stopped a cult following from forming around the dish.

The pizzahut bigfoot pizza debuted in 1993 and was nearly 2 feet long

The pizza debuted in 1993 and was nearly 2 feet long

major flop the McDLT

not only was it a flop, it also created about twice as much trash

Burger King - Cheesy TotsThe cheesy tots first made their way onto Burger King's menu in 2010, only to disappear later that year. That eventually led to a campaign to bring the tots back, which proved successful when they reappeared last month.

Burger King - Memphis BBQ SandwichThe Memphis BBQ sandwich, which hit menus last June, includes Sweet Baby Rays Sweet n Spicy BBQ sauce, bringing a bit of country cooking to Burger King's menu. And it may have just inspired other fast food chains, like Carl's Jr and Hardee's, to explore BBQ-themed items as well.

McDonald's - McRibThe barbecue-slathered McRib was such a hit in 1981 that it became a seasonal menu item the next year. The item is so popular, in fact, that it even boosted McDonald's profits at the end of last year.

McDonald's - Shamrock ShakeMcDonald's first introduced this mint-flavored shake topped with whipped cream and a cherry in 1970. Since then, it has garnered somewhat of a cult following at McDonald's. Despite such popularity, it can still only be purchased during certain times of the year.

Baskin-Robbins - Turkey CakeIt's a turkey, but it's also a cake, but it's also ice cream? This slightly bizarre specialty item became available in November of 2012.

Taco Bell - Doritos Locos TacosAfter it busted onto the scene in March of 2012, the Doritos locos taco quickly became the most popular item in Taco Bell history. In February, the fast food chain announced that a whopping 325 million had been sold.

KFC - Double DownThe sandwich is rather simple: just chicken cheese and bacon, sans the bread. But that hasn't stopped over 10 million people from trying it.

Starbucks - Pumpkin Spice LatteEvery fall, customers begin to crave Starbucks' pumpkin spice latte, so much so that the coffee giant struggled with a shortage last year due to have demand.