Creating this incredible Cajun Shrimp Mac & Cheese is easy if you follow these simple steps:

1. Cook the Pasta: Bring a large pot of salted water to a boil. Add the elbow macaroni and cook according to package instructions until al dente. Drain and set aside.
2. Season the Shrimp: In a bowl, toss the shrimp with Cajun seasoning until evenly coated.
3. Sauté the Shrimp: In a large skillet, heat olive oil over medium heat. Add the seasoned shrimp and cook for 3-4 minutes, or until they turn pink and are cooked through. Remove from the skillet and set aside.
4. Make the Roux: In the same skillet, melt butter over medium heat. Stir in the flour and cook for 1-2 minutes, whisking constantly until the mixture is light golden brown.
5. Add Milk: Gradually whisk in the whole milk, ensuring there are no lumps. Continue to cook until the sauce thickens, about 5-7 minutes.
6. Incorporate Cheese: Remove the skillet from heat and stir in the cheddar and mozzarella cheeses until melted and smooth. Add garlic powder, onion powder, salt, and pepper to taste.
7. Combine Pasta and Shrimp: Add the cooked pasta and shrimp to the cheese sauce. Stir until everything is well coated.
8. Bake (Optional): For a golden top, transfer the mixture to a greased baking dish. Top with additional cheese if desired and bake at 350°F (175°C) for 15-20 minutes or until bubbly and golden.
9. Garnish: Remove from the oven (if baked) and sprinkle with chopped green onions for a fresh touch.

By following these steps, you’ll create a wonderfully delicious Cajun Shrimp Mac & Cheese that will surely impress!