The dumplings I usually make are cooked in a fairly liquid dish, like a stew. They are literally dropped on top of the bubbling stew, covered and cooked more or less by steaming.
Here's the recipe I tend to make most:
1 cup all-purpose flour
2 tablespoons baking powder
1/2 teaspoon salt
parsley, mixed dried herbs to complement the stew, finely chopped onion, if desired
about 1/2 cup milk
Lightly mix the ingredients to form a thick batter; add more liquid if the mixture is too thick. Drop by heaping tablespoons onto stew, cover, and cook for 7 to 9 minutes (don't remove pan cover until minimum time is up) or until dumplings are puffed up but firm. The outside of the dumplings will look shiny. Recipe can be doubled or tripled.
My late grandmother added about 1/3 cup of shredded suet to the mixture, but that's too rich for most of my stews and 'hot pots' as she called them.