Pour the Chex cereal into a large Ziploc bag. Set aside.
Place white chocolate in a heated double boiler. While the chocolate is melting add the pumpkin pie seasoning. Stir to mix the spice throughout the melted chocolate.
Pour the melted chocolate into the bagged Chex mix, shaking the bag to cover all of the cereal pieces. Next, add the powdered sugar, shake well.
Empty the bag of Chex mix into a large bowl. And the candy and toss together.