One of our readers from Massachusetts sent this cupcake in. The Rice Krispy treat cupcake is a vanilla cake with marshmallow frosting, garnished with Rice Krispies! They were made by JennaCakes in Scituate MA and sold at Jw's burger bar in Scituate, MA. [Music Warning: the restaurant's website auto-plays "Cheeseburger in Paradise"]
BTW, if you want a recipe for making marshmallow creme, here's one from Brown Eyed Baker.