Combine spices: In a mixing bowl, combine 1 tablespoon of chili powder, 1 teaspoon each of cumin, paprika, garlic powder, onion powder, and oregano. Add 1/2 teaspoon each of salt and black pepper for a well-rounded flavor.

Stir well: Stir until all the spices are well blended. You want to see a uniform color and texture, ensuring every bite of your chicken will be bursting with flavor.

Store properly: Store your homemade chicken fajita seasoning in an airtight container for up to 6 months. Keep it in a cool, dark place to maintain its vibrant taste.