Cut the chicken breasts in half lengthwise to make 4 fillets. Season with salt, pepper, 1 teaspoon of onion powder and the garlic powder.
Heat the olive oil and 1 tablespoon of butter in a large skillet over medium-high heat.
Add the chicken to the pan and cook until golden , about 10 minutes ( 5 minutes per side). Transfer to a plate. Keep aside.
In the same skillet melt the remaining butter ( 2 tablespoons) over medium heat. Once it is melted, add in the flour and cook for about 1 minute.
Gradually add the beef broth and whisk until the flour is completely dissolved.
Season with Italian seasoning, onion powder, salt and pepper and add the Worcestershire sauce. Adjust the seasoning to your liking.
Return the chicken back to the skillet, bring to a gentle simmer and cook for about 5 minutes or until the chicken is cooked through (the internal temperature reaches 165 F |73 C) and the sauce has thickened up slightly.
Garnish with fresh parsley and serve immediately over mashed potatoes. Enjoy!