AllRecipes.com and Food.com have homemade fajita seasoning recipes. The two recipes are very similar, except the recipe on Food.com contains some crushed chicken bouillon cube, while the recipe on AllRecipes.com does not. Therefore, the AllRecipes.com fajita seasoning mix is ideal for vegetarians.
Both recipes contain cornstarch, chili powder, salt, paprika, sugar, onion powder, garlic powder, cayenne pepper and cumin. Increase the amounts of each ingredient to create a larger batch of seasoning to use in the place of store-bought fajita seasoning. Make sure to store in an airtight container to keep the seasoning mix fresh. Most reviewers on Food.com say that the seasoning mix recipe is better than the mix they previously bought in the store and rate it five stars.