 In wintertime, they are also sold in the street at mobile stalls.The dough is made from flour, eggs, yeast, some salt, milk, baking powder and usually sultanas, currants, raisins and sometimes zest or succade (candied fruit).A notable variety is the "appelbeignet" which contains only a slice of apple, but different from oliebollen, the dough should not rise for at least an hour.