It absolutely is. As a matter of fact, the first time I made it, for Kerry’s birthday, I drove it interstate to bring it to her at a dog show. (We both show dogs; she is a pro; I dabble).   I did use a proper cake box, but what makes this so portable is its sturdiness and the fact that the sides are completely covered with the toffee and mini chocolate chip mixture. It means there is no buttercream to smudge! Also, it can be left at room temperature for many hours, so that helps, too.