McDonald's customers upset over mozzarella sticks that lack a key ingredient

First it was Internet outrage over the Reese peanut butter Christmas trees that didn't look like Christmas trees. Now it's cheese-less cheese sticks.

Dozens of McDonald's customers on social media are complaining that the restaurant's mozzarella sticks are missing the cheese.

The new menu item was recently launched at McDonald's as part of its "McPick 2" menu. But customers have been tweeting photos of their orders and displeasure at the lack of cheese.

McDonald's issued a statement on Thursday: