Here's the taco seasoning we make:
2 tablespoons chili powder
1 tablespoon ground cumin
2 teaspoons cornstarch
2 teaspoons kosher salt
1 1/2 teaspoons hot smoked paprika
1 teaspoon ground coriander
1/2 teaspoon cayenne pepper
It's from the Alto Brown recipe that Papi mentioned.
I usually make a double batch so we have it on hand.
Here's the full recipe:
http://www.foodnetwork.com/recipes/alton-brown/all-american-beef-taco-recipe/index.html