A McDonald's restaurant sign is seen in San Diego, California, March 31, 2015. Reuters

McDonalds came under fire Wednesday as furious customers posted photos online of hollowed-out mozzarella sticks allegedly sold by the fast-food chain, Business Insider reported. Angry diners accused McDonalds of selling them “fried air," and customers are clearly not lovin' it.

The company launched its mozzarella sticks nationwide earlier this month as part of its new “McPick 2” promotion, which is reportedly meant to replace its popular Dollar Menu. The “McPick 2” menu allows customers to two choose of the following items for $2: McDouble, McChicken, small fries and mozzarella sticks. The fried snack is also offered on its own, costing $1 for three sticks.

However, only weeks after its launch, social media users took to Twitter to express their outrage over the apparently cheese-less sticks. One customer wrote that she is “never going back again,” and another wrote, “came in with extremely low expectation for @McDonalds mozzarella sticks.....yet somehow I was still disappointed.” Check out the pictures below.

Despite the mozzarella stick frenzy, McDonalds announced Monday its strongest sales growth of any quarter in nearly the last four years, showing an increase of 5.7 percent in the U.S., the International Business Times previously reported. Overall, profits last quarter increased to$1.2 billion, up from the $1.1 billion during the same period in 2014.

The news of McDonalds’ sales surge came on the heels of the burger chain expanding its breakfast menu beyond morning hours. The company agreed to make select breakfast items available from open to close. The demand for the breakfast sandwiches is so large that the chain reportedly buys over 2 billion eggs per year in the U.S. alone, or almost five percent of all eggs produced in the country.

"All-day breakfast was clearly the primary driver of the quarter," McDonald’s Chief Executive Officer Steve Easterbrook told investors in a conference call following the company's earnings announcement, the Washington Post reported. "We knew it would be."

When markets opened Monday, McDonald’s shares were up 3 percent, but finished the day up less than 1 percent.