1Cook the fettuccine pasta according to the package instructions. Drain and set aside.
In a large skillet, heat the olive oil over medium heat. Add the chicken breast and cook until browned and cooked through, about 5-7 minutes. Remove the chicken from the skillet and set aside.
In the same skillet, add the butter and let it melt. Add the garlic and sauté for about 1 minute until fragrant.
Add the mushrooms to the skillet and cook until they are tender and browned, about 5 minutes.
Reduce the heat to low and add the cream cheese, heavy cream, and grated Parmesan cheese to the skillet. Stir until the cheese is melted and the sauce is smooth.
Season the sauce with salt and black pepper to taste.
Add the cooked chicken back to the skillet and stir to combine.
Add the cooked fettuccine pasta to the skillet and toss to coat the pasta with the sauce.
Serve the Chicken Alfredo with Mushrooms hot, garnished with additional Parmesan cheese if desired.