01 -
Pour 1 cup apple cider into a small saucepan and bring to a boil over high heat. Boil for 1 minute, then reduce to a simmer and cook until reduced to 1/2 cup, about 10-15 minutes. Allow to cool completely.
02 -
Preheat oven to 375°F (190°C). Grease a standard donut pan thoroughly with non-stick baking spray.
03 -
In a large mixing bowl, whisk together cake flour, baking powder, cinnamon, nutmeg, and salt. Set aside.
04 -
In a medium bowl, whisk together reduced apple cider, milk, light brown sugar, granulated sugar, egg, melted butter, and vanilla extract until fully combined.
05 -
Pour wet mixture into dry ingredients and gently fold until just incorporated. Do not overmix.
06 -
Transfer batter to a large zip-top bag, trim a 1/2-inch opening from a bottom corner, and pipe batter evenly into donut molds, filling each about halfway.
07 -
Bake in preheated oven for 8-10 minutes, or until a toothpick inserted into a donut comes out clean. Cool in pan for 2 minutes, then transfer to a wire rack.
08 -
Combine granulated sugar and cinnamon in a bowl for coating. Set out melted butter separately.
09 -
Brush each warm donut with melted butter on both sides, then immediately dip into cinnamon-sugar mixture, coating thoroughly. Repeat with remaining donuts.
10 -
Serve donuts warm or at room temperature. Store leftovers in an airtight container.