In a large bowl, add your peanut butter, chocolate chips, and butter. Melt in the microwave for 1 minute or until melted. Melt in 30 second intervals, mixing in between to prevent from burning.
Add vanilla extract and stir.
Once your mixture is melted and smooth, add your cereal. I used 3 cups rice Square Cereal and 3 cups of Corn Square Cereal. (I like Chex brand)
Mix until your cereal is evenly coated.
Add half your of your powdered sugar (1 cup) and half of your cocoa powder (1/4 cup) into a large plastic zip up baggie and then add half of your chocolate cereal mixture. Seal the bag tightly and shake until evenly coated.
Repeat with additional powdered sugar and cocoa powder. I used two baggies for this process.
Pour back into your bowl and top with crushed Halloween Oreos, Candy Corn, Mini Pretzels, Spooky Sprinkles and anything else you'd like to add.
Stir, Share and Enjoy!! Be sure to store in an airtight container.