Abstract: A paperboard carton having a large capacity pouring spout formed in a relatively narrow end wall, the pouring spout being fabricated as the carton is tubed into knocked-down flat-folded condition, the carton having an opposing pair of side walls and an opposing pair of relatively narrow end walls, with a glue flap hingedly connected to the side edge of one of the side walls, the glue flap being juxtaposed and adhesively secured to the inner surface of the adjacent end wall to form a tubular carton body; an outwardly displaceable pouring spout tab is formed in the end wall to which the glue flap is juxtaposed, the pouring spout tab being of generally rectangular configuration and having one of its side edges lying along the line of articulation between the end wall and the other of the side walls, the underlying glue flap being enlarged to extend across the full width of the end wall in the area of the pouring spout tab, the enlarged portion of the glue flap having an extension hingedly connected to its outerm