In a medium bowl whisk the flour, baking powder, baking soda, salt and spices. In the bowl of a stand mixer, beat the sugar and butter until combined. Add the egg, additional egg yolks, and vanilla and stir to combine.
In a small bowl, combine the buttermilk and pumpkin puree. Mixing at a low speed add some of the dry ingredients, followed by some of the pumpkin mixture. Repeat with the rest of the dry ingredients and buttermilk mixture until well combined. Cover the dough and chill it for at least three hours or until it’s firm.
Roll out the dough to a thickness of ½”. Cut out the donut holes.
Heat two to three inches of oil in a large pan to 365-370°F. Fry the donut holes in batches until they are golden brown all over and cooker through, about three to four minutes. Transfer the donuts to a paper towel lined rack to drain the excess oil.
Combine the sugar and cinnamon in a bowl. When the donut holes are cool enough to handle roll them in the cinnamon sugar until evenly coated.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.