Preheat oven to 400 degrees and line pans with cupcake liners.
Combine all dry ingredients and then all the remaining ingredients.
Stir just until combined and then fill cupcake liners 3/4 full.
Drop about 1 teaspoon of Nutella into each muffin tin over the pumpkin batter (you don't want to use too much Nutella or the muffins won't rise correctly). Use a toothpick to swirl the Nutella in.
Bake for 15-17 minutes or until an inserted toothpick comes out clean (well, mostly clean, there may be some Nutella that sticks to the toothpick)