01 - Line a large baking sheet with parchment paper to prevent sticking.
02 - In a large mixing bowl, toss together crispy rice cereal, corn cereal, pretzels, salted peanuts, cheese crackers, mini chocolate-coated candies, and mini marshmallows until evenly mixed.
03 - In a microwave-safe bowl, combine white chocolate chips and coconut oil or vegetable shortening if using. Microwave in 30-second intervals, stirring thoroughly between each, until chocolate is melted and smooth.
04 - Pour melted white chocolate over the dry mix. Using a spatula, quickly and gently fold until every piece is evenly coated.
05 - Distribute the coated mixture in a single layer onto the prepared parchment-lined baking sheet. Let cool at room temperature for approximately 20 minutes until set.
06 - Once fully set, break the mix into chunks. Store in an airtight container at room temperature for up to one week.