Forget the monoliths—there’s a new monument perplexing America. An artist was commissioned by a local business owner to create a mural of Sesame Street’s Cookie Monster on the side of his building.

If you have ever wondered what the “Sesame Street” Muppet is really eating, we have the answer. By Sopan Deb Years ago, a reader wrote probing for details on a mystery that had vexed him: What’s the ...