The Belgian street food traditionally served in a paper cone with mayonnaise or other sauces is Belgian fries.
Belgian fries, known locally as frites or frieten, are thick-cut potatoes fried in stages. The double-frying method helps create a crisp exterior while keeping the center soft and fluffy. Street vendors commonly serve them in a cone or small carton with mayonnaise, though many other sauces are available.
Friteries and frietkots are central to Belgium’s takeaway food culture. Customers may choose from sauces such as tartare, Andalouse, samurai, or curry ketchup, depending on the vendor and region. Fries can also accompany dishes such as mussels, but they are widely eaten on their own.
Belgian fries are often called French fries in English, but the Belgian tradition is distinct in presentation and sauce culture. The historical claim that fries originated in Belgium remains debated, so the safest established fact is their strong place in Belgian culinary identity.