Follow these easy steps to create your Apple Cider Donuts:
In a small saucepan, bring the apple cider to a boil over medium heat. Reduce the heat and let it simmer until the volume is reduced to about 1 cup (approximately 15 minutes). Allow it to cool.
Preheat your oven to 350°F (175°C) and grease a donut pan.
In a large mixing bowl, whisk together the flour, sugar, baking powder, baking soda, cinnamon, nutmeg, and salt.
In another bowl, beat the eggs, then add the cooled apple cider, melted butter, and vanilla extract. Mix well.
Pour the wet ingredients into the dry ingredients and stir until just combined. Do not overmix.
Using a piping bag or a spoon, fill each donut cavity about halfway with the batter.
Bake in the preheated oven for 12-15 minutes, or until a toothpick comes out clean.
Let the donuts cool in the pan for 5 minutes before transferring them to a wire rack.
In a small bowl, mix the sugar and cinnamon for coating. While the donuts are still warm, coat them in the cinnamon-sugar mixture.