Take the extra cupcake and cut into little square chunks to make the stuffing. Pipe a flat swirl of buttercream onto the cupcake using your tan from the turkey. Then press the cupcake chunks onto the icing and use the tiny crumbs to cover the bare icing spots. Then add a few small fondant "celery" pieces and some green sanding sugar "spices". This is why I recommended making pumpkin cupcakes because this color worked perfect!