01 - Line a large baking sheet completely with parchment paper to prevent sticking.
02 - Thoroughly mix the rice cereal, corn cereal, pretzels, peanuts, cheese crackers, mini marshmallows, and chocolate-coated candies in a large mixing bowl.
03 - Place white chocolate chips and coconut oil or vegetable shortening (if using) in a microwave-safe bowl. Heat in 30-second intervals, stirring between each burst, until fully melted and smooth.
04 - Immediately pour the melted white chocolate over the cereal mixture and gently fold with a spatula until every component is evenly coated.
05 - Transfer the coated snack mix onto the prepared baking sheet, spreading it out in a single even layer.
06 - Let the mixture cool at room temperature for about 20 minutes, or until the coating has fully set.
07 - Break the set mixture into chunks and store in an airtight container. Consume within one week for best quality.