The iconic McRib sandwich is back at McDonald's, but not for long. Here's what to know

'Tis the season for McDonald's fan-favorite McRib sandwich, which returns to menus across the U.S. Tuesday.

Earlier this month, the Chicago-based burger chain , later saying the tangy meal would hit menus Dec. 3. The 520-calorie sandwich -- -- contains seasoned boneless pork dipped in a tangy BBQ sauce.

It is topped with slivered onions and tangy pickles on a tasted homestyle bun, McDonald's said.

"The wait is finally over," McDonald's said in a release. "Starting Dec. 3, for a limited time, your favorite saucy sandwich – the McRib – returns to participating restaurants just in time to satisfy your holiday cravings. After all, 'tis the season…McRib SZN, that is."

Late last month, McDonald's also began selling jugs of McRib sauce at a dedicated website, with half-gallons expected to be available "while supplies last."

As of Monday, Dec. 2, jugs of the sauce were sold out, .

According to officials, the McRib sandwich will be available for a limited time only.