01 - Bring a large pot of salted water to a boil. Cook pasta according to package instructions until al dente. Reserve 1/2 cup pasta water, then drain and set aside.
02 - In a large skillet over medium heat, melt butter. Add minced garlic and sauté for 1 to 2 minutes until fragrant but not browned.
03 - Stir in flour and cook for 1 minute to form a roux.
04 - Gradually whisk in whole milk and heavy cream, bringing the mixture to a gentle simmer.
05 - Stir in the Parmesan cheese until fully melted and smooth. Season with salt and black pepper.
06 - Add cooked pasta to the sauce, tossing to coat evenly. Incorporate reserved pasta water as necessary to achieve desired sauce consistency.
07 - Remove from heat. Garnish with chopped parsley and additional Parmesan if preferred. Serve immediately.