Preheat the oven to 350°F (175°C). Ensure the apples are peeled and cored. In a food processor, combine the flour, baking powder, and salt. Pulse a few times to mix. Add the softened butter and milk, then pulse until the ingredients are incorporated and a soft dough forms. Divide the dough into 6 equal pieces. On a lightly floured surface, roll each piece into a circular shape.
Place a peeled and cored apple in the center of each dough circle. Sprinkle about a tablespoon of cinnamon sugar inside the cavity of each apple (adjust to taste). Mold the dough around the apple, bringing the sides of the dough towards the top of the apple to ensure it is fully covered. The dough is easy to work with, making this step a breeze. Grease a 9x13-inch baking pan and arrange the wrapped apples inside.
Prepare the sauce. In a medium saucepan, combine the water, brown sugar, butter, and cinnamon. Whisk to combine and heat until the mixture is lightly boiling. Remove from the stove and let it cool slightly.
Pour the sauce around the dumplings, ensuring some of it spills over the top of the dumplings. At the halfway mark of the baking time, baste the apples with the sauce. Bake for 50-55 minutes or until the apples are tender. You can check the doneness by sliding a slender knife inside the apple.
Serve the Heavenly Apple Dumplings with a scoop of ice cream, a dollop of whipped cream, or a glass of cold milk. The irresistible sauce will take your taste buds on a delightful journey. Enjoy this heavenly treat!