Bring a large pot of salted water to a boil and cook the fettuccine for 8 to 10 minutes until al dente, then drain and set aside.
While the pasta cooks, melt the butter in a large skillet over medium heat for 1 minute.
Add the heavy cream, garlic powder, black pepper, and salt to the skillet and stir for 2 minutes until warmed through.
Remove the skillet from heat and stir in the Parmesan cheese until the sauce is smooth and creamy.
Toss the drained fettuccine in the sauce until evenly coated and serve immediately.