Begin by lining a baking sheet with parchment paper. This will be your base for the bark—set it aside for later use.
In a microwave-safe bowl, combine the dark chocolate chips. Heat in the microwave in 30-second intervals, stirring in between each session, until the chocolate is smooth and fully melted, approximately 1-2 minutes total.
Take 1 cup of the broken pretzel pieces and fold them gently into the melted dark chocolate, ensuring that each piece is thoroughly coated in the delicious chocolate.
Pour the chocolate-pretzel mixture onto the prepared baking sheet, using a spatula to spread it into an even layer, about 1/4 inch thick for a perfect bite.
In a separate microwave-safe bowl, melt the white chocolate chips using the same method (30-second intervals, stirring between) until the chocolate is silky and smooth.
Carefully drizzle the melted white chocolate over the dark chocolate pretzel layer. For more control, use a spoon or a piping bag to create attractive zigzag patterns.
While both chocolate layers are still melted, generously sprinkle the crushed nuts and mini marshmallows on top, allowing them to adhere to the surface.
For an extra indulgence, drizzle caramel sauce over the entire bark. Finish it off with a light sprinkle of sea salt to enhance the flavors.
Place the baking sheet in the refrigerator and chill for about 1 hour, or until the chocolate is completely set and firm to the touch.
Once the bark is fully hardened, break it into irregular pieces using your hands. Store the delicious treat in an airtight container to keep it fresh and ready for snacking.
Notes
Serve on a decorative platter or in treat bags as gifts.