01 - Bring a large pot of salted water to a rolling boil. Introduce the penne, cooking until it reaches an al dente texture, approximately 10-12 minutes. Reserve ¼ cup of the pasta cooking water, then proceed to drain the pasta and set it aside.
02 - In a spacious skillet set over medium heat, melt the butter. Add the minced garlic and sauté for approximately 30 seconds, or until its aroma is released.
03 - Reduce the heat to medium-low. Incorporate the heavy cream, milk, salt, black pepper, red pepper flakes (if utilizing), and Italian seasoning. Stir thoroughly and allow the mixture to simmer for 2-3 minutes.
04 - Gradually whisk in the grated Parmesan, ensuring continuous stirring to maintain a smooth consistency and prevent lumps. Should the sauce become excessively thick, introduce the reserved pasta water a little at a time until a fluid texture is achieved.
05 - Add the drained penne pasta to the skillet and toss to ensure it is thoroughly coated with the sauce. Allow it to cook for an additional 1-2 minutes for the flavors to meld.
06 - Remove the skillet from the heat. Top with fresh parsley, additional Parmesan cheese, and a sprinkle of black pepper. Serve immediately for optimal enjoyment.