In the same pan, add the butter, followed by onion with a pinch of salt. Cook until beginning to soften, about 4-5 minutes, then add in garlic, red pepper flakes and cook until garlic is fragrant, about 30 seconds.
4 tablespoons unsalted butter, 1 large yellow onion, ¼ - ½ teaspoon kosher salt, 20 cloves garlic, ½ teaspoon red pepper flakes
Meanwhile, cook the pasta 1-2 minutes under the package directions for al dente (it will finish cooking in the sauce). Reserve pasta water for later.
16 ounces pasta of choice
Deglaze the pan with white wine and cook for 2-3 minutes to cook out the alcohol.
¾ cup white wine
Reduce heat to medium-low, then add in cream cheese, then heavy cream, and stir to combine and heat through.
8 ounce block cream cheese, 2 cups heavy cream
Once the sauce is nice and smooth, begin adding in the parmesan in small handfuls, stirring to melt.
6-8 ounces freshly grated parmesan cheese
Add the black pepper, salt to taste, and freshly minced parsley, then add in the pasta and pasta water. Toss to combine and let the sauce cling to the noodles.
¼ cup fresh parsley , ½ teaspoon black pepper, ½-1 cup reserved pasta water
Add back the chicken and serve with more parmesan cheese and fresh parsley. Enjoy!
Store leftovers in an airtight container in the fridge for up to 4 days. Reheat gently on the stovetop with a splash of pasta water or broth.