ORLANDO, Florida – Wendy's is celebrating National Girl Scout Day today by giving customers a chance to score a free small Thin Mints Frosty with any purchase made through the Wendy's app or website. This limited-time offer, available only on March 12, 2025, at participating U.S. locations, including Florida, combines the classic Wendy's Frosty with a minty twist inspired by the beloved Girl Scout cookie. The Thin Mints Frosty comes in two flavors—chocolate or vanilla—each topped with a delightful cookie crumble, offering a refreshing treat just in time for spring. To claim this sweet deal, customers simply need to: Download the Wendy's mobile app and sign up for a free rewards account. Make any purchase through the app—whether it’s a small fry, a juicy burger, or anything else on the menu. Enjoy the free small Thin Mints Frosty, automatically added to qualifying orders. Wendy's announced the promotion as a fun nod to National Girl Scout Day, encouraging fans to act fast since the offer expires at midnight tonight.