San Francisco's Iconic Sourdough Is Made from 160-Year-Old Yeast

Boudin's sourdough bread's unique tangy taste and chewy center has been a hit with San Francisco residents since the bakery first opened in 1849. A big part of brand's success has been due to its unyielding consistency—a feat only accomplished because the company is still using the same yeast culture that Isidore… » 3/16/14 10:00am 3/16/14 10:00am