The heat level for this Cajun Shrimp Pasta recipe is completely customizable.  As written, I find 2 tablespoons Cajun seasoning and 1/4 teaspoon cayenne pepper to be on the spicy side as you would expect from a Cajun pasta – just how we like it!    To customize the heat level, I recommend adding 1 tablespoon Cajun seasoning to the shrimp then adding 1-3 teaspoons Cajun seasoning to the sauce (1 being mild, 3 being moderate). If you don’t like heat and want this very kid friendly, then omit the cayenne pepper.  If you aren’t sure how much Cajun seasoning to use then start with less then add more to taste at the end of cooking because you can always add more heat but it is hard to take away!