Is the Whoopie Pie the one sweet Brooklyn is known for? They seem to be at a lot of places. If so, One Girl Cookie has managed to perfect them. A whoopie pie is not really a pie, in the traditional sense of the word. It is more like a cake/cookie with a creamy center. Think an Oreo, but actually tasting good. The Pumpkin Whoopie Pie is like, um wow! It is as though two tiny arms made of pumpkin are gently holding a delicious cream cheese frosting between them. The most interesting thing about One Girl Cookies are the cookies themselves. They are small and they could be considered miniature. They're a perfect two bite sweet fix.