Prepare the Oven and Donut Pan: Preheat your oven to 350°F (175°C) and lightly grease a donut pan with cooking spray or butter. Set aside.

Mix the Wet Ingredients: In a medium saucepan, bring the apple cider to a simmer over medium heat. Allow it to reduce to about half its original volume, about 10-15 minutes. Once reduced, remove it from the heat and set aside to cool.

Combine Dry Ingredients: In a large bowl, whisk together the flour, baking powder, baking soda, cinnamon, nutmeg, allspice (if using), and salt.

Make the Batter: In a separate bowl, whisk the eggs, granulated sugar, melted butter, vanilla extract, milk, and the reduced apple cider. Add the wet ingredients to the dry ingredients and stir until combined. The batter will be thick, but that’s perfect for a soft cake-like texture.

Fill the Donut Pan: Spoon the batter into the donut pan, filling each cavity about 2/3 full. If you prefer, you can use a piping bag to make the process a little cleaner.

Bake: Bake the donuts for 12-15 minutes, or until a toothpick inserted into the center comes out clean. Allow the donuts to cool in the pan for a few minutes before transferring them to a wire rack.

Coat the Donuts: While the donuts are cooling, mix the granulated sugar and cinnamon in a small bowl. Once the donuts are cool enough to handle, dip each donut into the melted butter and then roll them in the cinnamon sugar mixture to coat.

Serve: Serve warm and enjoy the sweet, comforting flavor of apple cider donuts!