Cook Fettuccine pasta according to package directions. Drain and set aside.
Season Chicken with Cajun seasoning. Heat Olive oil in a large skillet over medium-high heat. Cook Chicken for 6-8 minutes per side, or until cooked through.
Remove Chicken from skillet and set aside. In the same skillet, melt Butter over medium heat. Whisk in Heavy cream, Parmesan cheese, Garlic powder, Black pepper, and Cayenne pepper. Bring to a simmer, stirring constantly, until sauce has thickened slightly.
Slice Chicken and add it to the Sauce. Toss to coat.
Add cooked Fettuccine pasta to the Sauce and Chicken mixture. Toss to combine.
