Mix flour, baking powder, salt, and milk or water to form a soft dough
Knead the dough lightly until smooth
Roll the dough out on a floured surface
Cut the dough into small squares or circles
Place a spoonful of cooked, shredded chicken in the center of each piece
Add a little onion, garlic, pepper, or herbs if desired
Fold and seal the dumplings tightly
Bring a pot of broth or water to a gentle boil
Drop the dumplings into the boiling liquid
Cook until the dumplings float and are fully cooked
Remove the dumplings with a slotted spoon
Serve hot with broth, sauce, or vegetables