Simmer the apple cider in a sauce pan over low-medium heat until it cooks down to ½ cup (120 mL).
Whisk together the flour, baking soda, baking powder, and spices. Then whisk together the butter, egg, brown sugar, granulated sugar, vanilla, yogurt, applesauce, and reduced apple cider.
Add the dry ingredients to the wet ingredients and whisk until a batter forms. Spoon or pipe the batter into the donut cavities. Bake for 11-12 minutes at 350F.
Whisk together the granulated sugar, cinnamon, and apple pie spice until combined. Melt your butter in a separate bowl.
Lightly coat the donut in the melted butter, then immediately coat the donut in the sugar mixture. Enjoy!