I L.O.V.E. party mix! This is a great one! The popcorn lends a fun crunch to this perfect combination.
Preheat the oven to 325 degrees F. Line a baking sheet with foil and set aside.
In a large bowl add popcorn, cereal, sesame sticks, and pretzels; toss well.
Melt the butter in a small saucepan over medium heat; whisk in the garlic powder, mustard powder, sugar, paprika, 1/2 teaspoon salt and a few grinds of pepper. Pour the butter mixture over the snack mix and toss well to coat.
Spread the snack mix in a single layer on the prepared baking sheet. Bake, gently stirring halfway through, until the popcorn is crisp, 15 to 20 minutes. Let cool. Transfer to a large bowl, add the cheese balls and toss to coat.