Preheat the oven to 375°F (190°C). Grease a 9x13-inch baking pan with olive oil or coat with cooking spray and set aside.
Season both sides of the 4 chicken breasts with kosher salt and freshly ground black pepper to taste.
Set out three shallow bowls: bowl 1 with 3/4 cup all-purpose flour (season with a pinch of salt and pepper), bowl 2 with the 2 beaten large eggs, and bowl 3 with 1 cup Panko, 1/2 cup grated Parmesan, and 1 ounce ranch seasoning mixed together.
Coat each chicken breast by dredging first in the flour, then dipping into the beaten eggs, and finally pressing into the breadcrumb mixture until evenly coated.
Place the coated chicken breasts in the prepared baking dish. Lightly spray the tops with cooking spray.
Bake for about 30 minutes, or until the internal temperature reaches 165°F (74°C) and the crust is golden brown.