Prepare Apple Cider Reduction: In a small saucepan, bring the apple cider to a boil over medium heat. Simmer until reduced to about 1/2 cup (approximately 15-20 minutes). Let it cool slightly.
Mix Wet Ingredients: In a large bowl, whisk together the granulated sugar, brown sugar, applesauce, eggs, vegetable oil, and the cooled apple cider reduction until smooth.
Combine Dry Ingredients: In another bowl, sift together the flour, baking powder, baking soda, cinnamon, nutmeg, and salt.
Combine Mixtures: Gradually add the dry ingredients to the wet mixture, stirring gently until just combined. Do not overmix.
Preheat Oven: Preheat your oven to 350°F (175°C) and grease a donut pan.
Fill Donut Pan: Spoon the batter into the greased donut pan, filling each cavity about 3/4 full.
Bake: Bake for 10-12 minutes until the donuts are lightly golden and a toothpick inserted in the center comes out clean.
Cool Down: Allow the donuts to cool in the pan for 5 minutes before transferring them to a wire rack to cool completely.
Prepare Maple Glaze: In a small bowl, whisk together the powdered sugar, maple syrup, and enough milk to achieve a thick but pourable consistency.
Glaze Donuts: Once the donuts are cool, dip the tops into the maple glaze, allowing the excess to drip off. Place them back on the wire rack to set.
Notes
Serve the donuts on a rustic wooden platter or a decorative cake stand, and garnish with a sprinkle of cinnamon and a small drizzle of additional maple syrup.