Preheat the oven to 350F. Line a cookie tray with tin foil and set it aside. Place Chex Mix in a large bowl.
Melt the butter in a small microwave-safe bowl. Pour butter and Wing Sauce over the Chex Mix and stir gently to evenly distribute.
Pour the Chex Mix out onto the lined cookie tray and spread out to make an even layer.
Sprinkle the cajun spice overtop of the Chex mix. Bake for 10-15 minutes, until the Chex Mix, is dry to the touch but before it starts to brown. Allow the Chex Mix to cool on the baking tray before packaging or serving.