Dunkin’ Donuts is rolling out plans to open dozens of stores in new and existing markets nationwide, including Milwaukee, Phoenix, Baltimore, St. Louis and Washington.

Canton, Mass.-based Dunkin’ Brands Inc. recently signed a new franchisee, InterOcean Coffee Co. LLC, that will head up the openings of 122 Dunkin’ Donuts in the Milwaukee and Phoenix markets. By the end of 2009, InterOcean plans to open seven Milwaukee locations and 18 Phoenix locations, the Business Journal of Milwaukee reported. Ultimately the company will open 72 stores in Phoenix and 50 in Milwaukee.

All told, the aggressive growth strategy means Dunkin’ Donuts will triple its store count to 15,000 over the next 13 years, the report said.

Dunkin’ Donuts recently launched a new line of products, including flatbread sandwiches, personal pizzas and hash browns. Within months the new menu is expected to be available at all locations. Last month the company announced plans to open 16 new stores in the Baltimore area and 70 in the D.C. area., as well as openings in Dallas-Fort Worth and St. Louis.

The new Dunkin’ Donuts franchisee, InterOcean Coffee Co. LLC, was formed by InterOcean Equity Partners LLC (a subsidiary of Chicago-based InterOcean Financial Group LLC) along with Stamford, Conn.-based Melrose Asset Management LLC.