Preheat oven to 350°F and spray two medium loaf pans with nonstick cooking spray, or four/five mini loaf pans (5 ¾ x 3 ¼ x 2 ¼. Don't fill more than ⅔ full.)

In a medium bowl, mix the flour, spices, salt, baking soda, and baking powder and set aside.

In the bowl of a stand mixer cream the butter and the sugar until fluffy, about two minutes. Add eggs one at a time mixing well after each addition. Add the pumpkin and combine well.

Add the dry ingredients stirring until just combined.

Layer ⅓ of the batter into the bottom of 2 loaf pans, swirl in a couple scoops of Nutella, do another layer of batter and another layer of Nutella and top with the remaining ⅓ of the batter.

Bake side-by-side for about one hour or until an inserted toothpick comes out clean. (Bake 35-40 minutes for the mini loaves.)