Preheat oven to 275 degrees.
Mix together the Corn Chex, Rice Chex, popped popcorn, gluten free pretzels, and mixed nuts in a large mixing bowl.
In a small bowl, add the dry spices (garlic powder, onion powder, cumin, chili powder, cinnamon, ginger, nutmeg, salt) and mix together until well combined.
Then, in a separate bowl, whisk the brown sugar into the warm melted butter until it’s completely dissolved.
Stir in the gf Worcestershire, add the spice mixture and whisk until well combined.
While stirring the Chex/popcorn mixture, slowly add the buttery spice mix, until evenly coated.
Spread the mixture out onto a large baking sheet.
Bake for 50 minutes, stirring halfway through.
Remove the snack mix from the oven and let cool for 15 - 20 minutes.
Stir in the mini marshmallows and candy corn.
Serve and Enjoy!