Excuse me, WHAT?

I don't understand the obsession with sweet potatoes in this country.  As I stated before, I tried a sweet potato latte on Thanksgiving, but at the time I thought that was a season goodness.  Wrong.

You can get anything sweet potato flavored here.  I must admit that I enjoy the occasional slice of sweet potato pizza, but this cake is just taking things to another level.  When I saw it in the bakery the other day I couldn't help but document this oddity.