Bring a large pot of salted water to a boil.
Add the egg noodles and cook according to package instructions until al dente.
Reserve 1/2 cup of pasta water, then drain the noodles.
Return the drained noodles to the pot over low heat.
Add the unsalted butter and stir until melted.
Gradually add reserved pasta water to achieve desired creaminess.
Season with salt and freshly ground black pepper to taste.
Mix well until noodles are evenly coated.
Garnish with chopped parsley if desired.
Serve immediately and enjoy your delicious buttered noodles!