Preheat the oven to 400 F or if using convection, then 375 F.
Batter
In a medium bowl whisk together the eggs, quark and cinnamon.
Then add in the flour and whisk until combined.
Milk Bath
In an 8" x 8" casserole dish (or one of the same volume) combine the milk, sugar, vanilla and melted butter.
Assembling and Baking
Using a 1/4 cup muffin scoop, scoop the batter into 12 portions and plop them into the milk bath.
Immediately put the baking dish into the oven on the middle rack and bake for 30-35 minutes until golden brown.
Serve immediately with a dusting of powdered sugar. The rohrnudeln will sink almost immediately but this does not affect their taste!
Notes
These should be eaten immediately after they are baked. They taste best with a fruity jam or whipped cream and fresh berries and don't forget about the powdered sugar.