Pour the oil into a zip top gallon bag.
Add the dressing mix, red pepper flakes, onion powder, garlic powder, and black pepper. Carefully whisk to combine.
Add saltine crackers, seal the bag and gently "toss" the crackers to coat.
Set aside overnight.
Preheat oven to 250℉.
Arrange crackers in a singer layer on baking sheets. Bake for 15 minutes.
Allow the crackers to cool on baking sheet. Store in airtight container until ready to serve.