Cook pasta until al dente; reserve some pasta water
Melt butter in a pan over medium heat
Add minced garlic and cook briefly
Pour in heavy cream or milk
Stir in grated Parmesan cheese
Add salt and black pepper to taste
Simmer gently until slightly thickened
Add reserved pasta water as needed for a smoother texture
Toss the sauce with the cooked pasta
Add more cheese or butter if desired
Serve immediately