In a large microwavable bowl, combine 1 cup of dark chocolate chips and 1 tablespoon of butter. Microwave on high for 30-35 seconds, stir, and return to the microwave for another 20-30 seconds until the chocolate is completely smooth and melted.

Add 1 cup mini marshmallows to the melted chocolate and butter mixture. Stir to combine, then microwave for another 30 seconds. Stir until the mixture is smooth and all the marshmallows are mostly melted. Be careful not to overheat, as this can make the chocolate thick and stiff.

Add 3 cups of crispy corn or rice cereal squares to the chocolate-marshmallow mixture. Gently stir to coat the cereal evenly with the mixture, being careful not to crush the cereal. Allow the coated cereal mixture to cool completely before proceeding.

Once the cereal is completely cool and coated, add 1 cup of powdered sugar a little at a time. Stir and toss gently to fully coat the chocolate-covered cereal. I like to use a large spoon or spatula and turn the mixture over lightly to keep the cereal pieces whole.

Stir in 1 cup dry roasted peanuts, 1 cup gluten free pretzels, the remaining 1 cup dark chocolate chips, and 1 cup mini marshmallows into the coated cereal mix. Toss to distribute all the mix-ins evenly. Serve and enjoy your gluten free snack mix!