Place wax paper, parchment paper, or a silicone mat onto a 13" x 17" baking pan and set aside.
In a large mixing bowl combine pretzels, cereal, M&Ms, marshmallows, and nuts.
In a medium microwave safe bowl place almond bark and melt for 90 seconds. Stir. Place back in microwave in 15 second increments to finish melting the bark.
Pour melted bark onto prepared baking pan and smooth out to cover pan.
Pour the pretzel, cereal, M&Ms, marshmallow and nut mixture all over the melted bark pressing into the bark evenly. (all mixture may not be needed.)
Melt extra white morsel chips and drizzle over top. Sprinkle with sprinkles.
Place in freezer for 2 hours to set up or refrigerator for 4-5 hours or you can leave on countertop longer until it sets and is solid.
Break into large pieces and keep in an air tight container.