Step 1

Cook pasta in large pot of boiling, salted water, stirring occasionally, for about 8 minutes or until al dente.

Step 2

Drain the pasta, reserving 1/2 cup of the cooking water.

Step 3

Add butter to still warm pot and melt over low heat. Turn off heat and add noodles to pot and toss with butter. Add Parmesan cheese and ¼ cup of cooking liquid at time as needed to moisten. Season with kosher salt and pepper and add parsley. Serve immediately.