01 - Bring a large pot of salted water to a boil. Add fettuccine and cook until al dente according to package instructions. Reserve 1/2 cup pasta cooking water, then drain the pasta.
02 - Melt butter in a large skillet over medium heat. Add minced garlic and sauté for 1 minute until fragrant, avoiding browning.
03 - Pour in heavy cream and bring to a gentle simmer. Cook for 2 to 3 minutes, stirring occasionally.
04 - Reduce heat to low. Gradually whisk in grated Parmesan until melted and the sauce is smooth.
05 - Season sauce with black pepper and salt. Add drained fettuccine to the skillet and toss to coat. If sauce is too thick, add reserved pasta water a little at a time to reach desired consistency.
06 - Remove from heat and stir in half of the chopped parsley.
07 - Plate immediately and garnish with remaining parsley and extra Parmesan if desired.