Place the chicken breasts between two sheets of plastic wrap and pound them to an even thickness (about ½ inch) to ensure they cook evenly.
In one shallow bowl, place the flour seasoned with salt, pepper, garlic powder, and paprika. In another bowl, whisk the eggs. In a third bowl, place the breadcrumbs.
Dip each chicken breast into the flour, then the egg, and finally coat well with breadcrumbs, pressing lightly to adhere.
In a large skillet, heat the olive oil and 1 tablespoon of butter over medium heat. Once hot, add the breaded chicken breasts and cook for about 5-7 minutes on each side until golden brown and cooked through.
Transfer the cooked chicken to a plate and keep warm.
In the same skillet, add the remaining 1 tablespoon of butter. Add the sliced mushrooms and sauté until browned and softened, about 4-5 minutes.
Pour in the heavy cream, scraping up any browned bits from the skillet. Stir in the Parmesan cheese and Italian seasoning, cooking for another 2-3 minutes until the sauce thickens slightly.
Season the sauce with salt and pepper to taste.
Place the crispy chicken on serving plates and spoon the creamy Parmesan mushroom sauce over the top. Garnish with chopped parsley.