In large microwavable bowl, microwave white chocolate chips uncovered for approximately 2 minutes, stirring every 30 seconds, until completely melted. Stir until smooth. Don't heat it in the microwave longer than 30 seconds at a time! You will scorch the white chocolate.
Gently stir in cereal, pretzels, candy corn and M&Ms until evenly coated.
Pour and spread evenly onto waxed paper or non-stick baking mat until chocolate is set and dry, about a half hour. Break into chunks and serve.
Recipe by Wishes and Dishes at https://wishesndishes.com/halloween-chex-mix/