01 -
Combine chicken broth, onion powder, garlic powder, basil, oregano, mustard powder, and dried parsley in a bowl. Set aside. Measure all remaining components.
02 -
Slice each chicken breast in half horizontally, resulting in 2 or 3 thinner fillets. Place under plastic wrap and pound to 1.2 cm thickness using the textured side of a meat mallet. Pat chicken dry.
03 -
Season both sides of chicken fillets with salt, black pepper, and Italian seasoning. Dredge each in flour, gently shaking off excess.
04 -
Heat olive oil in a large skillet over medium-high heat. Sear chicken in batches for 4-5 minutes per side until golden and cooked through. Transfer seared chicken to a plate and set aside.
05 -
With the skillet off the heat, pour in the chicken broth and seasoning mixture. Use a silicone spatula to loosen any browned bits from the bottom and sides of the pan.
06 -
Bring the mixture to a gentle boil. Reduce heat to medium-low. Whisk in the cream of chicken soup until fully incorporated. Gradually add sour cream, combining thoroughly, then pour in milk and stir in the lemon juice. Keep heat moderate to prevent sour cream from curdling.
07 -
Return seared chicken fillets to the skillet, spooning the sauce over each piece. Allow chicken to heat through for approximately 5 minutes. Garnish with fresh parsley if desired and serve immediately.