Preheat oven to 400°. Rub each ear of corn with ¼ tbsp. butter. Sprinkle garlic powder, chili powder, and parsley evenly onto ears of corn. Place corn onto cookie sheet line with foil. Bake in oven for 25 minutes. Turn corn and sprinkle ¼ tbsp. of parmesan on each ear of corn. Continue to bake for 10 more minutes or until corn is slightly caramelized brown. Eat warm.