Beat together:
4 eggs
8 T whipping cream
1/2 t salt
1/4 t pepper
1 t baking powder
1 c flour
Put 2-1/2 c flour in a large mixer bowl. Add the beaten mixture, and mix well with a dough hook. Turn out on a floured counter and put the mixing bowl over the dough. Let it rest for 10 - 20 minutes.
While the dough is resting, bring 3 qt of chicken broth to a boil in a large soup pot. Roll out fairly thin and cut into strips with a pizza cutter or a knife.
Heat the broth to a rolling boil, and add the noodles to the broth. After the noodles have cooked for 20 minutes or so, reduce to a simmer and cook for a couple of hours. While the broth is cooking, you can add carrots, celery, and chopped chicken.
After the noodles have cooked, you can either serve the soup, or you can refrigerate it. The soup is best if you let the noodles sit in the refrigerator for at least a day. To reheat, add additional chicken broth, and reheat slowly in a slow cooker, or over very low heat on the stove.