Boil a large pot of salted water.
Add the fettuccine and cook according to package instructions until al dente.
In a pan, melt the butter over medium heat.
Add the heavy cream and simmer for 5 minutes.
Gradually stir in the Parmesan cheese until melted.
Season with salt and pepper to taste.
Drain the pasta and reserve some cooking water.
Combine the pasta with the sauce, adding reserved water for desired consistency.
Toss to coat the pasta evenly.
Serve hot, optionally topped with grilled chicken or vegetables.