Pour your apple cider into a small saucepan over medium heat and bring to a boil. Allow to simmer for about 10 minutes or so, until reduced by half.
Set the 1/2 cup of reduced apple cider aside to cool a little, and when it is cooled, add the non dairy milk to it.
In the bowl of your stand mixer, place the butter and add the sugar to it. Mix for about 2-3 minutes on low-medium speed.
Next beat in the vanilla and cinnamon, and finally, add the milk/cider mixture. It will look weird and curdly, but don't worry.
Finally, add the dry ingredients and mix just until everything is incorporated.
Scrape the mixture into a piping bag, and grease your donut pan well.
Pipe the donuts into the donut pan, filling them about 2/3 of the way up.
Bake in a preheated 375 degree oven for about 11-12 minutes.
Remove from the oven and allow to cool slightly, then use an offset spatula or knife to run around the edges and remove the donuts to a wire rack to cool completely.
To do the cinnamon sugar option, melt the butter and place it in a wide, shallow bowl. Dump the cinnamon and sugar together into a bag and mix it well together. Dunk the donuts first into the melted butter, then drop them into the bag and shake them in the cinnamon sugar. Remove to the wire rack.
To do the maple glaze option, place the icing sugar in a bowl and then add enough maple syrup to make a glaze that is runny, but not too runny. You want it to stick on your donuts, but not be gloppy. Dunk your donuts in the glaze, then allow to set on a wire rack.