Bolas de fraile is the Argentine and Uruguayan version of a doughnut. It is made without a hole in the center, and the doughnut is usually filled with dulce de leche, then dusted with powdered sugar. It is believed that bolas de fraile is derived from a popular Germany pastry called Berliner Pfannkuchen.

The name of these tasty doughnuts means balls of weakness, and it is said that the name was invented by anti-clergy anarchists who wanted to oppose a harsh regime that was imposed by the Catholic church.