Cajun Spice Mix

   2 teaspoons salt
  2 teaspoons garlic powder
  2 1/2 teaspoons paprika
  1 teaspoon ground black pepper
  1 teaspoon onion powder
  1 teaspoon cayenne pepper
  1 1/4 teaspoons dried oregano
  1 1/4 teaspoons dried thyme
  1/2 teaspoon red pepper flakes (optional)