In the bowl of a mixer with a paddle attachment, mix all of the wet ingredients together. Add the dry ingredients and mix together until just combined.
Lightly coat a mini donut pan with baking spray. Then put the batter into a pastry bag and snip a small opening on the bottom. Pipe the batter into the donut pan till they are a little over half full.
Bake the donuts for 15-20 minutes until they spring back when touched. Let them cool for 10 minutes and then transfer to a wire rack and cool completely before glazing.
To make the frosting
Mix all ingredients together until smooth and the icing has a dip-able consistency
Dip each donut into some of the icing and top with festive sprinkles.
Notes
Don't skimp on the sprinkles. You could even search out Halloween, fall, or Thanksgiving ones to really go all-in.