Beat the egg yolks with the icing sugar until pale and creamy.
In a separate bowl, whisk the egg whites to stiff peaks.
Gently fold the flour into the yolk mixture, then fold in the stiff egg whites in two or three batches, keeping the mixture light and airy.
Heat plenty of oil or lard to 170°C in a deep pan.
Drop small dumplings of the mixture into the hot fat with two teaspoons, and fry over medium heat until golden-red, turning occasionally, about 3-4 minutes.
Drain on paper towels.
Meanwhile make the wine or vanilla sauce: simmer the wine with sugar and a little lemon zest until slightly reduced, or cook milk with egg yolk and sugar into a custard.
Serve the dumplings warm, drizzled with the sauce.
Based on: Malatinszky Fanny szakácskönyve (a classic Hungarian cookbook), modernised. Calories and protein are estimated.