Gather all of the ingredients you want to use for this Monster Snack Mix.
Melt chocolate bark in a microwave-safe bowl in 30 second intervals making sure to stir after every interval.
Coat Chex cereal and pretzels with white chocolate bark, spread on a parchment lined baking sheet and let them set.
Stir everything together in a large bowl.
Notes
Optional - popcorn, candy eyeballs, Cheerios, Halloween sprinkles, white chocolate chips, nuts, mini marshmallows, peanuts, Reese's pieces, or anything Halloween themed you need to use before the holiday.