Heat a large pot of water seasoned with salt until it boils. Cook the pasta until it's al dente, following the instructions on its packaging.
12 ounces dry fettuccine pasta
In a medium bowl, toss the shrimp with olive oil, blackening seasoning, and salt.
1 pound large shrimp, 1 tablespoon olive oil, 1½ tablespoons blackened seasoning, ¼ teaspoon kosher salt
Heat a large skillet over medium-high heat until hot. Add the shrimp in a single layer and cook for 2-3 minutes per side, or until just opaque. Don't overcrowd the pan, as it will lower the heat and prevent proper cooking. Remove the shrimp from the pan and set aside.
In the same skillet, make the Alfredo sauce (click for recipe) or heat from a jar. 2 cups Alfredo sauce
Add the cooked shrimp back to the sauce and gently toss to coat. Drain the cooked pasta and add it to the pan, tossing with the shrimp and sauce.
Garnish with freshly chopped parsley. Serve immediately with optional lemon wedges and hot sauce for an extra kick.
Chopped fresh parsley, Lemon wedges, Hot sauce