Churros, sometimes called Spanish doughnuts, are fried-dough pastry-based snacks, sometimes made from potato dough, that originated in Portugal. They are popular in Latin America, France, Portugal, the United States, and Spanish-speaking Caribbean islands. There are two types of churros in Spain. One is long and fat (porra), and the other, extra popular in Madrid, is thin and has knots . They are both eaten for breakfast or as a treat with chocolate or sugar .