All-day breakfast isn't the only popular menu item at McDonald's. The chains "Gilroy Garlic Fries," a limited-time menu item in the San Francisco Bay Area, have sold out. "In less than two weeks, our small, four restaurant test of Gilroy Garlic Fries has been a huge success, and we are now experiencing a temporary shortage of supplies," McDonald's told CNBC. The Golden Arches, which amped up its french fries in four locations in San Francisco in late April, expects to be restocked in a few weeks.

The made to order fries are tossed with a puree mix of garlic, olive oil, Parmesan cheese, parsley and salt. If successful in this small test market, McDonald's will make the specialty fries available in around 250 restaurants throughout the San Francisco Bay Area.