Heat 1 tablespoon of olive oil in a large skillet over medium-high heat. Season chicken with garlic powder, onion powder, paprika, cayenne, half the salt, and half the pepper.
Add chicken to the skillet in a single layer. Sear for 2 to 5 minutes on each side until browned, then transfer to a plate.
In the same pan, add remaining olive oil and sliced mushrooms. Cook until browned, about 4 minutes.
Add minced shallot, chopped onion, and garlic. Cook until soft and translucent. If using wine, add it now and simmer for 1 minute.
Add butter to the pan. Once melted, sprinkle in flour and whisk to form a smooth paste.
Gradually add chicken broth while whisking to keep the sauce smooth. Add Worcestershire sauce, thyme, and remaining salt and pepper. Bring to a light simmer.
Return chicken to the skillet and cook for 5 to 8 minutes until fully cooked.
Add cooked egg noodles and stir to coat. Stir in sour cream until smooth. Cook for an additional 2 minutes.
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Notes
Leftovers store well. Reheat with a splash of broth to keep the sauce creamy.