1. Preheat broiler.
2. Combine cookie crumbs and sugar in a small bowl.
3. Hollow center of peach halves using a melon baller. Fill each peach half with 1 rounded tablespoon cookie crumb mixture. Arrange peaches in an 11 x 7-inch glass or ceramic baking dish coated with cooking spray. Place 1 teaspoon butter on top of each filled half. Broil 2 minutes or until butter melts. Sprinkle evenly with chocolate. Cool 5 minutes before serving.