For the langos, pour 750 ml of the sour milk into a bowl (set aside 250 ml), add a little salt, baking powder and flour and mix until smooth.
Pour a lot of oil over the dough (so that it is covered) and let it rest – the longer the better!
After about 1 hour, cut or take away from the dough small pieces of dough (as big as the pan is, or if you want thicker or thinner langos).
Form nice circles with your hand as much as possible (doesn’t have to be rolled out). Heat plenty of oil in a frying pan and fry the rolled out pieces of dough until golden brown on each side.