Separate the Chex cereal into two large mixing bowls, 4 cups of cereal each.

In a microwave-safe bowl, combine the caramel bits and salt. Microwave in 30-second intervals, stirring after each, until fully melted and smooth.

In a microwave-safe bowl, add the green candy melts. Microwave in 30-second intervals, stirring after each, until fully melted and smooth. Stir in the apple pie spice until fully mixed.

Pour the melted salted caramel bits mixture over one bowl of the cereal and gently stir with a spatula until every piece is coated. Pour the apple spice melted candy melts over the second bowl of cereal and gently stir with a spatula until every piece is coated.

Transfer the coated cereal mixture into two separate Ziploc freezer bags. Add 1/3 cup of powdered sugar to each bag, seal with some air inside, and shake until well coated. Add more powdered sugar if needed, and shake again until fully coated.

Pour the coated cereal into a large serving bowl and add the optional add-ins: roasted peanuts, freeze-dried apples, and mini pretzel twists.

Stir to combine and enjoy!