Monday, December 4, is National Cookie Day, and to celebrate, a popular sandwich chain has a special treat for its customers.

Subway plans to turn four of its restaurants into “Cookieway” locations as the fast-casual concept plans to roll out a new footlong chocolate chip cookie across the country next month, including in Dallas.

Known for its footlong sub sandwiches, Subway patrons at select stores in the United States will receive one free footlong cookie with the purchase of any footlong sub on December 4.

The footlong cookie special can be found in Dallas at 1222 Commerce St., Suite 150. The cookies will be available from 1 p.m. to 6 p.m.

The other stores offering the footlong cookie treat are located in Chicago, Miami, and New York.

Subway claims to sell more fresh cookies than any other food retailer in the country. The company found that the footlong cookie might make for a quality fixture for its menu after its limited test run on National Cookie Day last year.

“The overwhelming response we received from fans around the country last year let us know that we needed to make the footlong cookie a permanent addition to our menu,” Subway’s Paul Fabre, senior vice president of culinary and innovation, said in a prepared statement.

“At Cookieway this year, our guests will get a sneak peek of an even better footlong cookie: thick, gooey, packed with chocolate chips, and served warm — right out of the oven. It’s the perfect pairing with your favorite footlong sub and may even become your favorite footlong after the first bite,” he added.

Founded in 1965 in Connecticut, Subway also sells salads, wraps, and bowls at nearly 37,000 stores globally each day. Subway revealed earlier this year that it would split its headquarters between Connecticut and Miami.