Combine the cream cheese and crushed Oreos, then roll into balls and place onto a cookie sheet lined with wax paper. Freeze for 10 minutes.
Melt the white chocolate chips in a microwaveable glass bowl for 30 seconds, then stir. Continue in 10 second intervals, stirring each time, until the chocolate can be stirred smooth.
Dip the oreo balls into the chocolate using two forks, shaking off the excess chocolate. Lay them back on the wax paper, and immediately sprinkle with lemon zest. Let stand until firm.