01 - Line a large baking sheet with parchment paper.
02 - In a large mixing bowl, add the crispy rice cereal, corn cereal, pretzel twists, salted peanuts, cheese crackers, mini chocolate-coated candies, and mini marshmallows. Stir gently to evenly mix all components.
03 - Place the white chocolate chips and coconut oil or vegetable shortening, if using, into a microwave-safe bowl. Microwave in 30-second intervals, stirring thoroughly between each burst, until completely melted and smooth.
04 - Pour the melted white chocolate over the dry snack mixture. Using a spatula, fold the mixture quickly and gently to ensure every piece is well coated.
05 - Transfer the coated mixture onto the prepared baking sheet and distribute in an even single layer.
06 - Let the mixture cool at room temperature for approximately 20 minutes or until set. Once firm, break into generous chunks and store in an airtight container for up to one week.