Preheat the oven to 400°F. In a large shallow bowl or on a large plate, combine the breadcrumbs, Parmesan cheese, garlic powder, salt, pepper, and paprika. Set aside.
Use a thin, sharp knife to slice each chicken breast in half lengthwise to create two thin fillets. Place the chicken breasts between two pieces of plastic wrap on a cutting board, and gently pound to about ⅜-inch with a meat tenderizer.
Brush both sides of the chicken fillets with mayonnaise to evenly coat. Dredge each of the chicken fillets in the breadcrumb mixture and place on a baking sheet sprayed with cooking spray. Bake for 17-20 minutes or until cooked through and the outsides are golden and crispy.
Notes
Instead of garlic powder, you can also use 1 clove of fresh garlic that's been pressed or very finely minced instead.Instead of Italian breadcrumbs, you can use regular breadcrumbs with 1 ½ teaspoons Italian seasoning added to it.