If you don't have taco seasoning at home, there's a few options you may already have in your pantry that you could use as a substitute. The most common substitute is chili powder. Chili powder is often a mix of various spices including cumin, garlic and onion powder. It's super rich in flavor, so works well on it's own. Other popular substitutes include sriracha hot sauce, fajita seasoning and chili-cumin combo. Some of these alternatives may contain gluten, so be sure to choose the gluten free versions.