Put the chicken breasts in a shallow bowl or pan and cover them with milk. Let the chicken soak for 15 minutes or longer (refrigerate the chicken, if necessary, to keep the ingredients cold).
Combine the crushed corn flakes, Parmesan cheese, parsley flakes, and pepper in a plastic bag. Shake the chicken pieces individually in the corn flake and cheese mixture, coating the chicken on all sides.
Spray a baking sheet with vegetable oil spray. Put the coated chicken breasts on the baking sheet. Bake the chicken in a preheated 375 degree oven for 45 minutes.