optional: candied hazelnutschopped, see recipe link in notes
Instructions
Preheat the oven to 325 degrees F. Grease a 9x5 inch loaf pan.
In a large bowl, combine the butter and sugars. Mix in the beaten eggs and mashed potatoes. Mix until smooth.
In a separate bowl, combine the flours, salt, baking soda, and pumpkin pie spice. Add half of the dry ingredients to the wet mixture and stir to combine. Next, add the hot apple cider to the wet mixture and stir well. Then, add the remaining dry ingredients and stir until combined. If adding chopped candied hazelnuts, stir them in now.
Add the batter to the prepared loaf pan and bake in the center of the oven for 1 hour 10 minutes, or until a toothpick inserted in the center of the bread comes out clean. Remove from pan and allow to cool on wire rack.
Once completely cool, wrap tightly in plastic wrap or aluminum foil.