An apparatus and method are provided for molding breast cups in a seamless circularly-knitted brassiere having a breast-covering portion and a torso encircling band, the apparatus comprising a base, a rear wall extending upwardly from the base, an upper mold plate extending outwardly and substantially horizontally from the rear wall, the upper plate having a pair of spaced openings formed therethrough, the openings spaced and dimensioned to correspond to a pair of breast cups, and a plate intermediate to the base and the upper mold plate, and being vertically moveable between a first, upper position and a second, lower position for securing a brassiere blank in position against the upper plate for the molding of breast cups therein.