1Preheat the oven to 400 degrees F (200 degrees C).
2Slice boneless skinless chicken breasts in half to form chicken cutlets, if using whole chicken breasts.
3Lay the chicken in a lightly greased baking dish and sprinkle lightly with salt and pepper.
4In a medium bowl, combine plain yogurt with mayonnaise, grated Parmesan cheese, a couple tablespoons of ranch seasoning, a pinch of crushed red pepper, salt, and pepper until well combined.
5Spread the mayonnaise mixture over the chicken.
6Bake at 400 degrees F for about 15 to 20 minutes, or until cooked through.
7Turn on the broiler for the last couple minutes (1 to 2 minutes) just to brown and bubble the top.