A highly flexible thermoformed stand-up dispensing package for a flowable material that is produced from one or more highly flexible heat-sealable polymeric sheets is formed with a trapezoidal front wall and opposing back wall and is dimensional and configured so that the corner of the package formed by the intersection of the top and the projecting side wall, or walls, that extend at an obtuse angle from the base is removable along a weakened tear line that is positioned upon removal to provide an integral pour spout for the controlled dispensing of the flowable material; and the container portion of the package is dimensioned to (1) maintain the center of gravity of the flowable material in the package over the base wall when the base wall of the filled package is in contact with a horizontal surface, and (2) to maintain the level of flowable material in the opened package is below the opened integral pour spout.