Preheat oven to 350°F. Line muffin pan with liners.
In a medium bowl, whisk flour, baking soda, baking powder and salt until well combined. Set aside.
In large bowl, whisk together pumpkin, sugar, brown sugar.
Beat in egg, vegetable oil, milk, pumpkin pie spice, and vanilla extract.
Slowly whisk in the flour mixture, until there are no lumps.
Add a dollop (about 1 tsp or so) of Nutella onto the bottom of each muffin liner and spread to cover the bottom.
Using a ice cream scoop or large spoon fill muffin tins to the top with pumpkin batter.
Top each muffin with about 1 tsp of Nutella and use a toothpick to swirl it into the top of the batter.
Bake muffins for 15-18 minutes, or until a toothpick inserted in the center comes out clean.
Notes
*Recipe note: the Nutella on the bottom of the muffin bakes and stays separated from the bottom of the muffin so it's a sweet treat at the bottom! If you would prefer it be mixed in, use a toothpick to swirl the Nutella on the bottom with the pumpkin batter.Adapted from http://www.thenovicechefblog.com/