Preheat oven to 400 F.
Cut the chicken breasts in half and place them in a greased baking dish.
2 large chicken breasts
Season them with salt and pepper.
salt to taste, pepper to taste
In a bowl, mix together the mayo, yogurt, ranch seasoning and 1 cup of the parmesan cheese.
1/3 cup Duke's light mayo, 1/3 cup nonfat plain Greek yogurt, 2 Tbsp ranch seasoning, 1 1/4 cups freshly shredded parmesan cheese
Spread the cream mixture over all of the chicken and then sprinkle on the remaining cheese.
Bake for 30 minutes or until it has reached an internal temperature of 165 F.