Mmm, s'mores! This is the third concrete flavor at the 7th Street DC location of Shake Shack, and it was as delicious as I expected :o)
The SMORSECode... concrete is a nod to the Spy Museum next door, and consists of chocolate custard, marshmallow sauce, and graham crackers from Pollystyle. The ample graham cracker pieces were definitely my favorite part - they definitely didn't taste like the normal boxed supermarket graham crackers, and added lots of crunch to the dish. Any s'mores fans will love this concrete!