Churros are not, like quite often stated, a donut-like Peruvian treat. Originating in Spain Churros are long sticks made of a choux pastry often potato based which is squeezed through a large star tip into hot oil and fried.
In Peru they are often filled with Manjarblanco or vanilla cream and then rolled in a sugar cinnamon mixture. While you can order them as dessert in many restaurants, Churros are best enjoyed bought from a street vendor and eaten warm. Absolutely delicious!