Step 1: Boil the pasta
Bring a large pot of salted water to a boil. Add the fettuccine and cook according to the package instructions until just al dente. Before draining, reserve about ½ cup of the pasta water. Drain and set the pasta aside.

Step 2: Cook the Cajun steak
Heat olive oil in a large skillet over medium-high heat. Toss your steak pieces with Cajun seasoning, smoked paprika, salt, and black pepper. Add the steak to the skillet and sear for 3–4 minutes per side, or until browned and cooked to your liking. Remove the steak from the skillet and set aside.

Step 3: Build the garlic butter base
In the same skillet, reduce the heat to medium and melt 2 tablespoons of butter. Add the minced garlic and sauté for about 1 minute, or until fragrant and golden but not burned.

Step 4: Make the creamy Parmesan sauce
Slowly stir in the heavy cream and softened cream cheese. Stir until the cream cheese is fully melted and the sauce starts to thicken. Add the Parmesan and mozzarella cheese, stirring constantly until the sauce becomes smooth and luscious. If it feels too thick, use the reserved pasta water, a tablespoon at a time, until it reaches the perfect consistency.

Step 5: Combine and serve
Add the cooked fettuccine and seared steak back into the skillet. Toss everything gently to coat in the sauce. Add red pepper flakes for an extra kick if desired. Sprinkle with chopped parsley and serve hot with extra Parmesan on the side.