Cool on pan 1 minute; transfer to wire racks to cool completely. Melt the white chocolate with the Crisco in the top of a double boiler over simmering water. Holding a cooled cookie between your thumb and forefinger, dip the edge into the warm white chocolate to cover the top third of the cookie. Place on a rack over wax paper to dry completely. Store between layers of wax paper in an airtight container in a cool place.