Add oyster crackers, pretzels, saltines, and Cheez-Its to a large bowl. Drizzle on oil and sprinkle ranch seasoning and dill over the top. Use a spatula to toss thoroughly until everything is evenly and well coated.
Spread the mixture in an even layer on the prepared sheet pan, making sure the ingredients aren’t overlapping.
Bake for 15 minutes, toss well, then bake for another 5–10 minutes, or until the mixture is dry and crisp.
Remove from the oven and let cool completely on the pan. The mix will continue to crisp as it cools.
Notes
Note 1: I’ve tried several ranch seasoning mixes, and Hidden Valley is the only one I really love here. It’s a little more expensive, but totally worth it IMO!Note 2: If you don’t love dill, this mix is still great without it. If you do love dill, add up to 3 teaspoons!Storage: Once completely cooled, store in an airtight container at room temperature for up to 2 weeks.