Sixty 31st Avenue, San Mateo, CA 94403 | (650) 532-1022
Temporarily ClosedOpen Today: 10:00 am - 9:00 pm

Crisp-fried portobello mushroom filled with melted Muenster + cheddar cheeses, topped with lettuce, tomato, and ShackSauce. Safe to say, if you haven’t tried it, you need to. Located in the North Block Plaza.