Carefully measure all the spices and have them ready.
In a medium bowl, combine the chili powder, ground cumin, paprika, onion powder, garlic powder, dried oregano, ground coriander (if using), cayenne pepper, salt, and black pepper.
Use a whisk or a fork to thoroughly mix all the ingredients until well blended. Make sure there are no clumps.
Taste the seasoning and adjust the salt, cayenne pepper, or any other ingredient according to your preference.
Transfer the seasoning mix into an airtight container, like a glass jar with a tight-fitting lid. Store in a cool, dry place. You can also seal in a vacuum sealer bag for later use.
Use approximately 2-3 tablespoons of this taco seasoning per pound of meat or vegetables. You can also add it to soups, stews, or casseroles for an extra flavor boost.