I don't know what it is but since we were in Vegas I actually was considering the Rossini $60 burger. As much as I wanted some Foie gras I just decided on the kobe beef burger with some smoked gouda, fried egg, portabella mushrooms, caramelized onions all on a ciabatta bun. DAMN!! that first bite was vegas worthy and worth the $25. Hahaha Also ordered the salted caramel shake and ga-damn that hit the spot. LOVE this place. Check it out if your ever in the area.