The primary ingredient in a funnel cake is a sweetened batter made from flour. This batter is typically prepared by mixing flour with eggs, milk, sugar, and baking powder to create a smooth texture. The unique aspect of funnel cakes is how the batter is poured into hot oil in a circular, spiral pattern, resulting in a light, crispy texture. Generally served at fairs and carnivals, funnel cakes are often dusted with powdered sugar or topped with various sweet toppings, making them a popular treat in many regions.