It has been about 10 years since I purchased store bought taco seasoning, I know it is a little extreme, but you know what, I have modified a taco seasoning recipe that I found when my husband and I were married. It has been a favorite of ours since our two-person kitchen in our condo. I typically 3X's the recipe below but only double the red pepper flakes. It is super easy to make. I store it in with my spices/herbs in my kitchen in an spice container dedicated to taco seasoning, and just reuse the container each time that I make a new batch.
1 tablespoon chili powder
1/4 teaspoon garlic powder 1/4 teaspoon onion powder
1/4 teaspoon crushed red pepper flakes
1/4 teaspoon dried oregano
1/2 teaspoon paprika
1 1/2 teaspoons ground cumin
1 teaspoon sea salt
1 teaspoon black pepper