Line a cookie sheet with wax paper.
Process Oreos in food processor until crushed into larger pieces.
Melt chocolate chips by microwaving 45 seconds and stirring and repeating until melted and smooth.
Pour onto prepared pan and smooth into an even layer.
Distribute crushed Oreos over the chocolate.
Place in refrigerator for 15 minutes to set up.
Process mints in food processor until crushed.
Melt white chocolate chips by microwaving 45 seconds and stirring and repeating until melted and smooth.
Pour onto cooled chocolate and Oreos and smooth to cover.
Distribute pepermint over the white chocolate layer.
Place in refrigerator for at least 30 minutes to set up.
Break into pieces before serving.