Beat all ingredients except for the cooking water in the mixing bowl (wooden spoon with a hole in the middle or a mixer possible) until air bubbles appear. Then let it rest for about 10 minutes. The dough should be able to steep without tearing!
Place the spaetzle grater on a saucepan with approx. 4 liters of boiling water. Portion the dough with the spatula and slowly stroke it through the holes.
Bring the spaetzle to the boil once, use a slotted spoon to place the spaetzle on top in a bowl with a sieve insert and keep it warm.
Repeat the process until the batter is used up. Season with butter and, if necessary, with salt and white pepper.