Source: Food & Wine 

White Castle announced plans to become “one of the first fast-food hamburger chains in the U.S. to offer a dairy-free alternative to cheddar cheese.” (The 200-plus location chain Fatburger, which also serves Impossible patties, introduced plant-based cheddar slices last year, likely making them the most prominent fast food burger chain to already be in the dairy-free cheese game.) 

Starting on March 1, White Castle says locations in New Jersey and New York City will offer dairy-free cheddar as a free addition to any slider—including, of course, the plant-based Impossible Slider.