Grassburger is a fast-casual restaurant specializing in 100% grass-fed beef burgers, but they also cater to vegan and gluten-free diets. Their vegan offerings include a black bean patty made from black beans, quinoa, certified gluten-free oats, and spices, available as a burger or in a Southwest Vegan Bowl with rice, quinoa, pico de gallo, and spicy serrano sauce. They also offer non-dairy shakes and fries cooked in dedicated gluten-free fryers. Grassburger is family-friendly, with pet-friendly patios, and provides catering services.