Ghirardelli debuted the Dubai Chocolate Sundae at their home base in San Francisco on March 8 to much fanfare. The line wrapped around the block as people with a sweet tooth waited hours for a lick.

Ghirardelli, which started some 80 years before the Empire State Building came to define New York City's skyline, was founded in San Francisco in 1852 and is one of the country's longest-operating ...