Question: are cayenne and cajun the same?
Answer: As you may have suspected, cayenne pepper is the primary heat source for Cajun spices. Cayenne ranks between 30,000 and 50,000 on the Scoville scale, so it's a medium-hot chili. But there's normally less of cayenne powder in Cajun seasoning than other ingredients, so the mix doesn't normally taste quite that hot.