REDWOOD CITY, Calif., and COLUMBUS, Ohio – White Castle announced on Sept. 12 that the Impossible Slider, a scaled-down version of the plant-based Impossible Burger, is now available nationwide.

The company first launched the slider in New York, New Jersey and Chicago in April.

The Impossible Slider is served with smoked cheddar cheese, pickles, onions and served on White Castle’s signature bun. Single Impossible Sliders retail for $1.99 and can be ordered as part of a combo meal, the company said.

“Our Cravers definitely developed a hunger for the Impossible Slider,” said CEO Lisa Ingram, whose family has led White Castle for four generations. “Sales easily exceeded our expectations. The Impossible Slider is a hit with both loyal ‘Cravers’ and customers brand new to White Castle who are seeking out this buzz-worthy slider.”

The Impossible Burger, which was developed in 2011 by Impossible Foods, is formulated to look and taste like conventional ground beef but is made from plant ingredients. The discovery of a molecule called “heme” gives the burger its beef-like attributes, according to the company.

“White Castle is teaching us how to popularize plant-based meat and become a mainstream, mass market menu item and cultural icon,” said Patrick Brown, MD, Impossible Foods’ founder and CEO. “This partnership is a big win for consumers, with the partnership of White Castle and Impossible Foods.”

Redwood City, California-based Impossible Foods produces the plant-based burgers and other products at the company’s 68,000-sq.-ft. production plant in Oakland, California. Impossible Burgers are appearing on mainstream restaurant menus across the country as well as at award-winning restaurants in New York, San Francisco, Houston and Las Vegas. The company also is pursuing non-commercial foodservice sales targeting universities, company dining halls and other institutions.