This is one of those batch components that pays for itself immediately. A jar of store-bought Cajun seasoning runs $5-7 and is mostly salt. When you mix your own, you control the salt ratio, the heat level, and the freshness — and it costs pennies per batch. The base is simple: paprika for color and body, garlic powder, onion powder, cayenne for heat, oregano, thyme, black pepper, and salt. I keep the cayenne moderate in the base recipe so it works on everything — chicken, shrimp, vegetables, even popcorn. If you want more heat for a specific dish, add cayenne at cook time instead of building it into the blend. Store it in a mason jar away from heat and light and it'll stay potent for 3-4 months. Once you start making your own spice blends, you'll never go back to store-bought.
Combine all ingredients in a bowl and mix thoroughly until evenly blended.
Transfer to an airtight container or jar.
Store in a cool dark place for up to 6 months.
Notes
A homemade Cajun spice blend you can mix in five minutes and use on everything. Make it once, keep it in the pantry, and stop buying overpriced store bottles.