Season both sides of the chicken breasts with salt, pepper, and Italian seasoning.
In a large skillet, heat olive oil over medium-high heat. Add the chicken breasts and cook for about 6-7 minutes per side until golden brown and cooked through. Remove the chicken from the skillet and set it aside.
In the same skillet, add butter and let it melt. Add the sliced mushrooms and cook until they are golden and tender, about 5-6 minutes. Then, add the minced garlic and cook for another 1-2 minutes, until fragrant.
Pour in the chicken broth, scraping up any browned bits from the bottom of the skillet. Allow it to simmer for about 2-3 minutes. Next, pour in the heavy cream and stir well to combine. Let it simmer for an additional 5 minutes to thicken slightly.
Return the cooked chicken to the skillet, spooning the creamy mushroom sauce over the top. Let it heat through for about 3-4 minutes. Adjust seasoning with more salt and pepper if necessary.
Remove from heat and garnish with freshly chopped parsley before serving.
Notes
Serve on a bed of mashed potatoes or pasta, garnished with parsley.