Rub the yeast with the sugar, then add the milk and flour. Mix until smooth. Let ferment for 15-20 minutes at 26–28°C.
Place the flour, sugar, salt, eggs, and flavorings in a bowl. Add the starter and milk. Mix until the ingredients are combined, then add the butter and spirits. Knead until a smooth, elastic dough forms.
Cover the dough and let it rise until doubled in volume.
Deflate the dough and roll it out to 1.5–2 cm thickness. Cut out rounds, fill with Lauretta fillings, and shape into doughnuts.
Let the doughnuts rise until light and puffy.
Fry at 175-180°C for 2-3 minutes per side. Drain excess fat.
Dust with powdered sugar or glaze with icing and garnish with orange zest.