Melt white chocolate coating in either a double boiler or in the microwave.
When chocolate is melted, use a spreader knife to frost the chocolate coating over one side of the Oreo. You may also wish to dunk the Oreo cookie completely into the chocolate as well.
Decorate with toppings of your choice.
Let cookies cool on waxed paper.
Video
Recipe Tips
When melting in a microwave, glass bowls work the best.