Line a baking sheet with parchment paper and set it aside.
Place the white chocolate chips in a microwave-safe bowl. Heat in 30-second intervals, stirring after each, until the chocolate is fully melted and smooth.
Pour the melted chocolate onto the prepared parchment and spread it into an even layer about 1/4 inch thick.
Press the mini pretzels gently into the chocolate so they stick but stay mostly on top.
Add pairs of candy eyeballs across the surface to create ghost shapes. Place them while the chocolate is still soft.
Transfer the baking sheet to the refrigerator for 20 minutes or until the bark is firm.
Break the bark into pieces by hand once it has set.