Preheat oven to 300 degrees F. Line baking pan with parchment paper and set aside.
Combine Chex, Goldfish, and cashews in large bowl.
Pour melted butter over mixture and stir well.
Toss well with Ranch seasoning.
Pour onto prepared baking pan and bake in preheated oven for 20 minutes, tossing after 10 minutes.
Let cool completely and store in airtight container.
Enjoy!