Sake sack burger joint Cooks up new black truffle burgers.

These are most likely artificial black truffles. Because black truffles can cost $95 a ounce. Anyway, it's a distinct fungi flavor that apparently is supposed to make. More people like it. So they've got this mushroom burger with Normal black truffles along with. the normal burger, but the fries have a Parmesan. black truffle dipping sauce.