Combine egg, salt, and milk. Add flour. (For thicker noodles, add baking powder to flour before mixing). Separate into 2 balls.
Roll out dough, and let stand for 20 minutes.
Cut into strips and spread to dry. Dust with a little flour and let dry for approximately 2 hours.
Drop into hot soup. Cook for about 10 minutes.
NOTE: When I make this recipe, I never let them dry. I usually make them to go with pasta sauce, not in soups, so right after rolling them out I just cook them in boiling water for 7 to 10 minutes. They are so good!