For the peach dumplings, whisk eggs, sugar, vanilla sugar until foamy. Fold in flour with baking powder, spread on a baking tray and bake at top/bottom heat at 180 degrees.
When cool, cut into cubes, they should be smaller than 1 cm. Cut the peaches into small cubes as well. Whip 2 cups of whipped cream and mix everything with eggnog.
Using an ice cream scoop, cut the mixture into equal portions and form balls. Heat the butter in a pan and lightly roast the crumbs in it, add a little sugar. When the crumb mixture has cooled down, roll the dumplings in it. Put in a cold place.