Cajun seasoning is a spice blend used to add savory flavor to all sorts of dishes, from burgers and seafood to soups and stews. You can add Cajun seasoning to anything that needs a little Cajun kick. For instance, it works well in:
Soups and stews (especially gumbo, jambalaya, and red beans and rice)
Spice rubs for grilled chicken, beef, pork, and seafood
Seafood dishes with shrimp or fish
Fried chicken batter or breading
Sauces to serve over pasta or rice
Spicy barbecue sauces
Hamburger patties and meatballs
Seafood patties and fish cakes
French fries, sweet potato fries, and hashbrowns
Source: What Is Cajun Seasoning and How Do You Make It At Home? | Allrecipes