Kosher salt and freshly ground black pepper, to taste
Egg noodles, for serving
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Instructions
1. Pat the chicken breasts dry with paper towels, cut into 1-inch pieces, and season lightly with salt and pepper. Dredge in flour and shake off excess.
2. Heat 2 tablespoons of olive oil in a skillet over medium-high heat. Brown the chicken in batches for 2–3 minutes per side until golden. Transfer to a plate.
3. Add remaining oil and butter to the skillet. Sauté mushrooms and onions for 6–8 minutes until softened and caramelized.
4. Stir in dry mustard, Worcestershire sauce, and garlic; cook for about 1 minute until fragrant.
5. Pour in chicken broth, deglazing the pan and simmering until reduced slightly.
6. Return the chicken to the skillet and simmer on medium-low for 5–7 minutes until cooked through.
7. Lower heat and stir in sour cream until creamy. Adjust seasoning and serve over egg noodles.