This is a classic whoopie pie recipe, but with a marshmallow creme filling. Those who like rocky road will love these. Marshmallow creme is a spreadable marshmallow confection, which can be purchased online or in specialty shops.. A whoopie pie (alternatively called a gob, black-and-white, bob, or "BFO" for Big Fat Oreo) is a baked good made of two round mound-shaped pieces of chocolate cake, sometimes pumpkin cake, with a sweet, creamy frosting sandwiched between them. . A bit too big for a whoopie pie, and the fondant icing on top is unnecessary and very DIY, but an overall delight, especially the tangy filling. Harrods (£2.50 each, or £1.25 for a mini whoopie . Chocolate whoopie pies are an American favourite that you can now create at home with this easy to follow, delicious and simple recipe from Jamie Oliver.. A few years before the whoopie pie became Maine’s official treat, the Maine Whoopie Pie Festival was established by the Center Theatre in the small rural town of Dover-Foxcroft.. L.D. 71, officially known as "An Act to Designate the Whoopie Pie as the State Dessert", read "The whoopie pie, a baked good made of two chocolate cakes with a creamy frosting between them, is the official state dessert"..