In a small bowl, whisk together the cumin, cayenne, chili powder and salt. Set aside.
Heat the oil in a large dutch oven until it reaches 350 degrees. Cooking in batches, add 3-4 tortillas and fry for 1-2 minutes. Using tongs, flip the tortillas and fry for an additional 1 minute or until they're golden brown and crisp. Transfer to a plate lined with several paper towels and sprinkle with the spice mixture. Repeat until all the tortillas are fried and seasoned.
Store in an airtight container for up to 24 hours.