Cut the chicken breasts in half or in thirds if they are large breasts. Place chicken strips in a gallon bag with the sour cream. Squish around until all the chicken is coated in sour cream. Put chicken in the fridge for at least 4 hours.

Preheat your oven to 375 degrees. Line a baking sheet with foil and spray with a non-stick cooking spray.

Crush up the crackers and put them in a shallow dish with the parmesan cheese. Mix the cheese and crumbs together. Coat the chicken in the cheesy crumbs a piece at a time place on the prepared baking sheet. Leave a little space between each piece of chicken.

Bake at 375 degrees for about 25 minutes or until chicken is cooked all the way through.