Meanwhile, a Reddit user compared an ad for the KFC ricebox with the sloppy mess he received from the chain

A McDonald's customer is warning others to think twice before ordering the fast food restaurant's newest menu item as she has revealed that two out of three of the mozzarella sticks she purchased from the chain were missing a rather key ingredient: cheese.

Shannon Gannery snapped a photo of the hollow breaded shells and shared it on Imgur, revealing that only one of the three pieces actually contained mozzarella. However, she found the fast food fail to be laughable.

'Tried MickeyD's new mozzarella sticks... 2/3 were completely hollow. LOL [sic],' she wrote of the $1 menu item.

'Bread sheaths': Shannon Gannery snapped a photo of the hollow mozzarella sticks she got during a trip to McDonald's as she revealed that two out of three of them were missing cheese

Mouthwatering: The company's picture of the specialty item shows a mozzarella stick that is torn in half but still connected by an abundance of stringy cheese

The image was also shared on Reddit, and one user noted: 'That's disappointing even for McDonald's' while someone else joked: 'Healthy Choice Menu....less fat.'

When one person asked Shannon if she had returned the hollow sticks, she explained: 'Unfortunately, I had driven away by the time of discovery. I did send them this picture on social media... We'll see if they reply.'

Meanwhile, another Reddit user was amazed that McDonald's was selling mozzarella sticks, but Shannon corrected him and noted they are 'just bread sheaths'.

The mozzarella sticks a sticks are yet another way that McDonald's are shaking up their menu to try to attract new customers after the chain's all-day breakfast menu has proved to be a disaster.

McDonald's began test-running the snack in New York, New Jersey and Connecticut with success in 2014, and the company announced last week that the new menu item will be available nationwide in 2016.

The company's picture of the specialty item shows a mozzarella stick that is torn in half but still connected by an abundance of stringy cheese. However, the fast food chain may want to place special attention to how long the mozzarella sticks are being cooked if they want to avoid more complaints.

Sadly shriveled: Danny Allen from Edinburgh, Scotland, shared this photo of his disappointing Double Rodeo BBQ burger from the Burger King restaurant at Fort Kinnaird last month - which looked nothing like the ad

More appetizing than reality: The Rodeo burger features flame-grilled beef patties, two breaded onion rings, and cheese topped with barbecue sauce - and is supposed to look like this

While many Reddit users poked fun at the missing cheese in the image Shannon had posted, others explained that the missing cheese was a result of them being cooked too long to the point that the 'cheese melted and seeped out into the fryer'.

But McDonald's isn't the only fast food restaurant to face the social media wrath of its irritated customers.

Last month, Danny Allen from Edinburgh, Scotland, bought the Double Rodeo BBQ burger from the recently-opened Burger King restaurant at Fort Kinnaird only to receive two shriveled pieces of meat that do not come close to filling the bun, slice of plastic-looking cheese, and two soggy-looking onion rings soaked in barbecue sauce.

The customer shared a photo of his disappointing meal on the Burger King UK Twitter page, writing: 'Paid £6 ($9) for this at BK Edinburgh Fort Kinnaird. No wonder the place is like a ghost town.'

Danny's image came just weeks after a photograph showing a KFC ricebox that looked nothing like what the company had been advertising went viral.

The Reddit user from the US, known as atheistlee, received hundreds of shares and comments on the image captioned, 'What I thought I was eating, what I actually got.'

Not quite right: A Reddit user shared this photo comparing an ad for the KFC ricebox (left) and the meal he actually got (right)

Delivery disaster: Chloe Venables took a picture of her broken Domino's pizza (right), which looks nothing like the company's ad (left)

The comparison shows a well-lit and stylized version of the meal for KFC's advertising campaign alongside the actual stark reality of the product which shows limp pieces of battered chicken in white sauce slapped on top of some soggy looking rice.

He said: 'It cost me £6.09 which is about $9.25. I don't expect it to look perfect, but I do expect more than a tiny scoop of rice and half a chicken breast.'

And a photographer called Dario D set up a project named 'A lifetime of disappointment, bafflement, and rage' to capture the differences in fast food products being sold to how they appear in the ads.

He said: 'People around the world know fast food as one of the most reliable distributors of disappointment ever produced by the business world.

'We know that if we ever feel the need to complain about something, we can just grab a page out of a coupon booklet, adorned in pictures of juicy burgers, go to a fast food place, then have a party.

'Why, the places themselves usually plaster their walls with pictures of juicy burgers - often hanging right over your table - so you need only open your eyes to find something to compare your food with, while you eat it.'

The photographer found that the burgers being advertised were not as tall in reality and that most of them wouldn't even fit in their boxes if they were sold that way.

Great expectations: Jeremy Morgan bought a Breakfast Burrito from Burger King expecting to see fluffy eggs and sausage (left) but was given a soggy wrap with a brown mushy filling (right)

Completely different: An Australian 7-Eleven showed a cheese and bacon roll (left), but John Patrick Lopez found a hollow piece of bread with little filling (right)

Extremely disappointing: Chris Fiery bought a KFC burger with the filling spilling out and a misshaped patty (right) while the ad shows a golden burger which costs $2 in Singapore (left)

After trying and failing with a Burger King Whopper burger, he wrote: 'They need to fire the guy who does his yoga on top of the Whoppers.'

Other customers left disappointed have shared their pictures to show the gulf between the ads and the real deal.

Chloe Venables took a picture of her Domino's pizza which appeared to have taken a bashing on route to her house and looked remarkably different from the golden pizza featured in the company's ad.

A Burger King customer who bought a Breakfast Burrito from the chain was left puzzled. Jeremy Morgan expected to see a wrap filled with vegetables and meat patty but received a soggy wrap filled with brown mush.

John Patrick Lopez ordered a cheese and bacon roll from an American fast food chain and found in contrast to the filled sandwich in the ad, his was practically empty.

Another Domino's customer shared their disappointment at receiving a misshapen pepperoni pizza while the ad showed a glossy pizza with plenty of topping.