Reduce the apple cider: In a small saucepan, over medium heat bring apple cider to a slow boil, reduce heat and simmer for 20 minutes until 1/2 cup of apple cider is remaining. Stir occasionally. Set aside for 10 minutes to cool.
Preheat oven to 350 degrees.
Spray donut pans with baking spray with flour and set aside.
In a large bowl, whisk together flour, baking powder, baking soda, salt, cinnamon, nutmeg and ginger. Set aside.
In another bowl, whisk together granulated sugar, dark brown sugar, milk, melted butter, pure vanilla extract and egg until combined and smooth.
Add the wet ingredients and the reduced apple cider to the dry ingredients and mix until smooth.
Spoon, pour or pipe batter into the prepared donut pans filling halfway full.
Bake for 10-12 minutes or until a toothpick inserted into the center comes out clean or with a few crumbs on it. The edges and tops should be lightly browned.
Let donuts cool in the pan for 5 minutes before removing them from the pan.
Mix together the topping while the donuts are cooling in the pan. Stir together sugar and cinnamon.
Brush on remaining melted butter onto all sides of the donut.
Dip both sides of the donut into the sugar-cinnamon topping.
Serve immediately.
Enjoy!
Store leftovers in an airtight container for up to 3 days. Place in the refrigerator for up to 5 days.