Other mix-ins: coconutcashews, Teddy Grahams crackers, other cereals, etc.
Instructions
Line two large baking sheets with silicone mats or parchment paper.
In a very large bowl, toss together cereal, peanuts, almonds, and pretzels (or any other mix-ins you're using). Just make sure your total measurement of stuff in the bowl is 15 cups.
In a microwave safe bowl, melt chocolate and butter in 30 second increments, and mix until smooth.
Pour chocolate mixture over cereal mixture, and gently mix until completely coated.
Spread evenly over prepared pans, and refrigerate for an hour or until chocolate has set back up.