If you attend Carnivals, fairs and Festivals often, you learn a few things, including that almost anything can be battered and deep-fried is at the top of that list. Examples include frog legs, classic desserts like Oreos & Twinkies, and just about anything else. A deep-fried Oreo is a sweet or savory treat made of a chocolate sandwich cookie that has been battered and deep-fried. It can be served with a variety of garnishes, the most popular of which is powdered sugar.