Combine flour, baking powder, baking soda, cinnamon and salt in a medium size mixing bowl.
In a separate bowl or measuring cup, mix together the apple cider, sour cream, melted butter, sugar, brown sugar, egg and vanilla.
Add the wet ingredients into the mixing bowl with the dry ingredients. Stir well until combined.
Heat up your donut maker and add a small drop of oil to each mold. Fill each mold with about ⅛ of a cup of donut batter. Let it bake for 1 ½ minutes, flip and bake an additional 1 ½ minutes. Remove to a cooling rack and repeat with the rest of the batter.
Once all the donuts are done, combine the sugar and cinnamon from the topping and set in one bowl. In a separate bowl, place your melted butter.
Dip the donuts into the butter, and then the cinnamon sugar.
Enjoy!
Notes
I made these donuts using a Dash mini express donut maker. It made the process very simple, similar to making homemade waffles in a waffle maker. If you don't want to purchase one, they could also be baked in the oven in a mini donut pan.
Greek yogurt works great as a substitute for sour cream. Make sure it’s plain and unsweetened, or you'll add too much sugar to your donuts.
If you don't want to use freshly milled flour, you can use all purpose flour in place of soft white. Use 1 ¼ cups of all-purpose flour and leave the rest of the ingredients as they are.
Be sure to weigh the flour after you mill it; don't just weigh the berries.