Preheat your oven to 375 degrees Fahrenheit (190 degrees Celsius).
In a medium-sized bowl, mix together the mayonnaise, sour cream, Dijon mustard, garlic powder, paprika, and a pinch of salt and pepper.
In a separate shallow dish, combine the grated Parmesan cheese and seasoned breadcrumbs.
Dip each chicken breast into the mayonnaise mixture, ensuring it is evenly coated. Then, dredge it in the Parmesan and breadcrumb mixture, pressing down to coat both sides well.
Place the coated chicken breasts on a baking sheet lined with parchment paper or sprayed with non-stick cooking spray.
Bake in the preheated oven for 20-25 minutes, or until the chicken is cooked through and the crust is golden brown and crispy.
For an extra crispy finish, you can broil the chicken for an additional 2-3 minutes. Watch closely to prevent burning.