Whisk together onion flakes, flour, bouillon granules, garlic salt, cumin, paprika, chili powder, cayenne pepper, and sugar in a bowl.
Now use as you would be the packet of seasoning mix.
Notes
Suggest storage in airtight container, like mason jar. At normal room temps.I suggest making a batch as written, use it and see if you and your family enjoy the flavor. Adjust as till you find the "right" mixture for your family's taste. For ease of use I make enough ahead to last a couple of months, which depends on how often you use.