Mix on the sheet the Oreos, pretzels and ¾ cup of the M&M's.
Melt the white chocolate chips in a microwave safe bowl for 30 seconds at a time, stir, and continue melting in microwave for 30 seconds at a time until melted and smooth.
Drizzle over the candy mixture and top with extra M&M's and sprinkles.
Allow to cool in the refrigerator until hardened.
Recipe by Makobi Scribe at https://makobiscribe.com/christmas-bark-recipe/