A McDonald's chef says he's looking into bringing back a cult classic McNuggets sauce after a cartoon demanded its return.

On Saturday, Adult Swim aired the first new episode of "Rick and Morty" since 2015 as an April Fools' Day treat for loyal fans.

The episode ended with a plea from mad scientist Rick for McDonald's to bring back its Szechuan McNugget sauce, a plum sauce that was available for a limited time in 1998 to promote the Disney movie "Mulan."

"I'm not driven by avenging my dead family," Rick says in the episode's closing minutes. "I'm driven by finding that McNugget sauce. I want that 'Mulan' McNugget Sauce. ... That's my series arc, Morty. If it takes nine seasons, I want that McNugget Szechuan sauce."

After the episode, it became clear that "Rick and Morty" fans and writers were just as determined as Rick to bring back the sauce — and that McDonald's might be open to their demands. A Change.org petition calling for the return of the sauce received more than 13,500 signatures by Monday morning.

A corporate chef at McDonald's tweeted at Business Insider's Ashley Lutz saying he'd "see what I can do."

McDonald's will be presented with a convenient opportunity to bring back the sauce when a live-action remake of "Mulan" is released in November 2018.