"Rick and Morty" fans rejoice.

McDonald's Szechuan sauce is making an epic comeback.

Starting at 2 p.m. on Saturday, a limited quantity of Szechuan sauce packets will be available at select McDonald's locations with the purchase of buttermilk crispy tenders.

McDonald's East Lansing location on East Grand River Avenue is one of the participating restaurants.

A single, unopened packet of McDonald's Szechuan sauce can be flipped for as much as $50 on eBay.

Why?

The sweet-and-tangy sauce debuted for a limited time back in 1998 as a way to promote Disney's "Mulan."

But recently, the once-forgotten sauce gained a large following thanks to Cartoon Network's Adult Swim program, "Rick and Morty."

"I'm driven by finding that McNugget sauce," said mad scientist Rick Sanchez on the season 3 premiere back in April, declaring his undying love for McDonald's Szechuan dipping sauce. “I want that Mulan McNugget sauce, Morty!”

After the episode aired, fans launched an online petition to bring back Szechuan sauce.

"The fact that the show is so beloved and has enough influence to get the sauce brought back, even for a day, is pretty cool," said Lansing resident and "Rick and Morty" fan Chelsea Randall.

Fans will also have the chance to receive collectible Szechuan sauce posters and stickers while supplies last.

Contact Princess Gabbara at pgabbara@lsj.com or (517) 377-1006. Follow her on Twitter at @PrincessGabbara.

How to go

McDonald's, 1024 E. Grand River Ave., East Lansing. Buttermilk crispy tenders are $3.79 to $3.99 for a four-piece serving. Szechuan sauce packets limited one per customer.