Located within the new Union "shop" at the Biltmore, they have a mini-stand offering these fun treats (the new cupcake, if you will...or more realistically, the new way I'm gonna gain some pounds).
Cost - $3.28 with tax, cash. I paid cash so I'm not sure if they pass on a convenience charge for credit, but they did appear to have Square for credit charges.
I got a flavor I assume is seasonal - pumpkin with cinnamon buttercream. It was delicious! My only complaint being that the top of my pie was a bit squished into the top of the wrapper.
It looked like maybe 3 others flavors are offered, but perhaps that will expand in future weeks. I know I have my eye on the Mexican chocolate chile flavor!