Melt In Your Mouth Chicken

4 boneless chicken breast halves
2/3 cup mayonnaise
1/2 cup freshly grated parmesan cheese
1/2 teaspoon salt
1/2 teaspoon ground black pepper
1 teaspoon garlic powder

Mix mayo, cheese, and seasonings. Place chicken pieces in a 9x13 baking dish. Spoon mayo mixture onto tops and sides of chicken. Bake uncovered at 375°F for about 30-40 minutes, or until cooked through.