Cook the pasta according to package instructions in a large pot of salted boiling water until al dente. Drain and reserve 1 cup of pasta water.

In a large skillet over medium heat, melt the butter. Add the minced garlic and sauté for about 1-2 minutes until fragrant, being careful not to burn it.

Add the cooked pasta to the skillet and toss to combine with the garlic butter.

Gradually stir in the grated Parmesan cheese, adding reserved pasta water as needed to create a creamy sauce.

Season with red pepper flakes (if using), salt, and black pepper to taste. Toss everything together until well combined.

Serve immediately, garnished with chopped fresh parsley and extra Parmesan cheese if desired.