Start by boiling salted water and cooking your cavatappi noodles until al dente. I like to taste a noodle a minute before the package instructions end to make sure it has a firm bite. Drain and set aside while preparing the shrimp.
Season the shrimp evenly with blackened seasoning. Melt butter in a skillet over medium-high heat, then cook the shrimp 4–6 minutes, flipping halfway through. Once cooked, remove from the skillet to keep them tender.
In the same skillet, lower the heat to medium and pour in the heavy cream. Stir and scrape up the flavorful bits left from the shrimp. Let it simmer gently before adding tomato paste, sour cream, and parmesan cheese, stirring until smooth.
Add the cooked pasta, shrimp, and drained corn to the sauce. Toss everything together until every noodle is coated. Garnish with chopped green onions for freshness and a pop of color before serving.