For light, fluffy dumplings, be sure the berry mixture is boiling before dropping the dough on top. If the mixture isn't hot enough, the tops of the dumplings will be wet and doughy. Dumplings need steam to rise during cooking, so don't lift the cover and peek because the steam will sneak out.
Any type of fresh or frozen berries can be used in this recipe. Try blueberries, strawberries, raspberries or a combination of two or three. If you use frozen berries, be sure to buy the bag of berries that aren't frozen in syrup.