In a small bowl, whisk together chili powder, red pepper flakes, cayenne, oregano, smoked paprika, cumin, garlic powder, onion powder, salt, and pepper until evenly combined.
Transfer the taco spice to an airtight jar. Store in a cool, dry place for up to 6 months.
To season meat, use about 1 tablespoon per pound of cooked meat and adjust to taste.
Notes
Store this taco seasoning blend in a sealed container in a cool, dry place. It makes about 8 tablespoons, enough for several meals.