(CNN) – Subway will celebrate upcoming National Cookie Day in a big way with a sneak peek of its new footlong cookie.

On Monday, Dec. 4, fans can get a free footlong chocolate chip cookie with the purchase of a footlong sub.

The cookie giveaway will be available at select Subway locations in Chicago, Illinois, Dallas, Texas, Miami, Florida and New York City.

However, you better get there early.

Subway did a limited run of footlong cookies last year in Miami on Cookie Day, and they were snapped up in less than two hours.

The chain says it sells more freshly baked cookies than any other restaurant company in the U.S.