Start by slicing the chicken breasts in half lengthwise for thinner, evenly cooked pieces. Season them generously with salt, pepper, and garlic powder on both sides.
Heat the olive oil in a large skillet over medium heat. Add the chicken and cook for about 5-6 minutes per side until they’re golden brown and cooked through. Remove the chicken and set it aside on a plate.
Reduce the heat to medium and melt the butter in the same skillet. Stir in the minced garlic and cook for about 30 seconds, just until fragrant. Whisk in the flour and stir continuously for 1-2 minutes, forming a smooth roux.
Step 4: Make the Creamy Sauce
Gradually pour in the chicken broth while whisking to dissolve the flour. Stir in the heavy cream and Italian seasoning. Bring the mixture to a gentle simmer and allow it to thicken for a few minutes. The sauce should coat the back of a spoon.
Turn off the heat and stir in the grated parmesan cheese, letting it melt fully into the sauce. Taste and adjust the seasoning with more salt and pepper as needed.
Return the chicken to the skillet along with any juices that have collected on the plate. Spoon the sauce over the chicken and cook for another minute until everything is heated through. Sprinkle with fresh parsley before serving.