Render the bacon. Place chopped bacon in a cold skillet. Turn heat to medium and render slowly until crisp. Remove bacon with a slotted spoon and reserve. Leave 2–3 tablespoons fat in the pan.
Prepare the seasoned flour. Whisk together flour, cornstarch, salt, pepper, garlic powder, onion powder, sweet paprika, smoked paprika, baking powder, thyme, and cayenne in a wide bowl.
Prep the chicken. Pat cutlets dry. If using, dip briefly in buttermilk or beaten egg, then dredge thoroughly in the seasoned flour. Place on a wire rack and rest 10–15 minutes.
Brown the chicken. Heat skillet to medium‑high until fat shimmers. Add cutlets one at a time, listening for an immediate sizzle. Don’t move them; when they release easily and are deeply golden, flip and brown the other side. Transfer to a plate. (They will finish in the gravy.)
Toast the thickener. Lower heat to medium. Add 1–2 tablespoons of the seasoned flour to the pan fat and stir until it toasts slightly—about 30–60 seconds. This removes raw flour taste and concentrates seasoning.
Build the gravy. Add the cream of chicken soup to the pan and begin whisking. Add milk or stock gradually until the sauce loosens and becomes smooth. Scrape up all fond. Simmer gently until the gravy thickens and tastes cohesive. Skim excess fat if the surface looks greasy.
Finish the chicken. Nestle the browned cutlets into the gravy, partially submerged. Cover and simmer on low until chicken reaches 165°F and is tender, about 10–15 minutes.
Buttered noodles. While the chicken finishes, cook egg noodles in well‑salted water. Drain, return to pot, and toss with butter and a pinch of flaky salt until glossy.
Assemble and finish. Plate noodles, top with chicken, spoon gravy over everything, and scatter reserved crisp bacon. Add parsley if using. Serve with a spoon.