Prepare the Base: In a large pot or Dutch oven, combine the cooked chicken breast, cream of chicken soup, and chicken broth. Bring the mixture to a simmer over medium heat. Season with salt and pepper to taste.

Make the Dumplings: In a medium bowl, mix the Bisquick baking mix and milk until a soft dough forms.

Cook the Dumplings: Drop spoonfuls of the dough into the simmering chicken mixture. Make sure the dumplings are evenly spaced and not touching each other too much. Reduce the heat to low and cover the pot.

Simmer: Let the dumplings cook for about 10 minutes, then uncover and cook for an additional 10 minutes. The dumplings should be fluffy and cooked through.