Place the saltine crackers in a large, sealable container or two large zip-top bags, arranging them so they can be evenly coated without breaking.

In a medium bowl, whisk together the vegetable oil, ranch seasoning mix, garlic powder, onion powder, crushed red pepper flakes, cayenne pepper, smoked paprika, and black pepper until well combined.

Pour the seasoned oil mixture evenly over the crackers.

Seal the container or bags and gently turn, shake, or toss the crackers every few minutes until they are thoroughly coated.

Let the crackers sit for at least 1 hour, turning them occasionally so the seasoning continues to distribute evenly.

For the best flavor, allow the crackers to rest overnight before serving, shaking once or twice during the resting time.

Serve the fire crackers as a zesty appetizer or snack, or store them in an airtight container at room temperature for up to 1 week.