American fast-food chain White Castle has introduced plant-based burger, Impossible Slider, to its 140 locations in New York, New Jersey and Chicagoland.

Manufactured by Impossible Foods, Impossible Slider is made using wheat protein, potato protein, water, coconut oil and heme and is free from hormones, cholesterol, artificial flavours and antibiotics.

The restaurant chain will offer the plant-based burger, which is priced at $1.99, with smoked cheddar cheese, onions and pickles.

Impossible Foods founder and CEO Patrick Brown said: “White Castle’s model has been often imitated but never duplicated, an impressive feat in the hyper-competitive fast-food sector.

“White Castle claims it is the largest single restaurant group to serve the Impossible Burger.”

“We look forward to working closely with White Castle, and together learning how to popularise plant-based meat with mainstream burger lovers.”

White Castle claims it is the largest single restaurant group to serve the Impossible Burger and has plans to expand the offering to its remaining locations in the US.

Apart from White Castle locations, the Impossible Burger is also available at 1,300 restaurants including Fatburger, Hopdoddy, The Counter, Umami Burger and B Spot.

The burger debuted in July 2016 at Chef David Chang’s Momofuku Nishi in Manhattan. Impossible Foods plans to launch the burger in Asia later this month.

Established in 1921, White Castle currently operates 400 restaurants in 13 US states offering hamburgers, crafted sliders and other fast-food options.

The company also owns and operates meat processing plants, bakeries and three frozen food processing plants.