Boil the pasta briefly in lightly salted water, not completely al dente.
Meanwhile, grease a suitable baking dish with butter and sprinkle with breadcrumbs.
Pour off the pasta water, add 2 tablespoons of butter to the pasta pot and let it melt. Then mix in 4 tablespoons of sugar and the quark. Finally add 2 eggs and mix everything well with the pasta.
Put the pasta in the baking dish. Now preheat the oven to 200 degrees.
Now put the remaining eggs in the pasta pot, plus the milk, a pinch of salt and the sugar. Whisk everything together and pour over the pasta. Sprinkle with breadcrumbs and spread the butter flakes on top.
Bake in the oven at 200 degrees for about 25 minutes. Finally sprinkle with powdered sugar.