White Castle Buns Are Now Vegan, Meaning the Veggie Sliders Are, Too

When White Castle first tested vegan burger patties with nonvegan buns and a dairy-based sauce, we contacted the chain and started a great dialog. When the veggie burgers officially launched, the fast-food giant was sure to include a Sweet Thai sauce as a vegan option—and now, after months of testing, it has switched to a vegan bun recipe in all its restaurants.