Bright spot serving Mast Brothers chocolate in cold-brew, soda & other drinkable forms. The beleaguered chocolatiers behind the Mast Brothers are going big with a new factory and "chocolate brewery" at the Brooklyn Navy Yard. Michael and Rick Mast are taking over a 65,000-square-foot space at the Navy Yard to act as their primary headquarters and production facility, according to the Times. The chocolate company will double their existing workforce with the expansion, and in addition to continuing to make its signature chocolate bars, Mast Brothers will be debuting a "chocolate brewery," where non-alcoholic chocolate beer will be produced, according to a release.