Pound chicken to an even thickness and soak in buttermilk for at least 30 minutes or overnight.
Combine panko, Parmesan, garlic powder, onion powder, paprika, Italian seasoning, salt, and pepper.
Coat each chicken breast thoroughly in the breadcrumb mixture.
Heat olive oil and butter in a skillet over medium-high heat. Pan fry chicken 4–5 minutes per side until golden.
Transfer chicken to a baking sheet. Add mozzarella and Parmesan on top, then broil 2–3 minutes until melted.
In a saucepan, melt butter and sauté garlic until fragrant.
Whisk in flour and cook 1 minute to form a roux.
Slowly add cream and broth while whisking continuously.
Stir in Parmesan and Italian herbs. Simmer until thickened.
Plate chicken and spoon the garlic cream sauce over the top. Garnish with parsley.