Start by seasoning your chicken breasts on both sides with kosher salt, ground black pepper, garlic powder, and Italian seasoning.
In a large skillet over medium-high heat, melt 2 tablespoons of unsalted butter. Add the seasoned chicken breasts and sear for about 5-7 minutes on each side until golden brown.
Remove the chicken from the skillet and set aside. In the same skillet, melt the remaining 2 tablespoons of butter and sauté the sliced mushrooms and chopped garlic for 3-5 minutes until tender.
Pour in the chicken broth and stir in Worcestershire sauce. Bring to a simmer, scraping any bits off the bottom for added flavor and allow it to reduce for 3-4 minutes.
Lower the heat and stir in the sour cream and condensed mushroom soup until well combined. Heat through but do not boil.
Return the chicken to the skillet, spooning sauce over the top. Simmer for an additional 2-3 minutes until warmed through. Serve over cooked egg noodles and garnish with parsley.