Cakey, pillowy-soft pumpkin cookies, loaded with spice, are sandwiched with fluffy Nutella buttercream frosting! I'm not afraid to claim that these Pumpkin Nutella Whoopie Pies are one of the best pumpkin desserts and fall recipes EVER. You've got to try pumpkin and Nutella together, and start with these Pumpkin Nutella Whoopie Pies!