Preheat oven to 350 degrees Fahrenheit. Line with muffin cups or grease a muffin pan and set aside.
In a large bowl, stir together pumpkin, sugar, butter, eggs, and vanilla extract.
Add flour, baking powder, baking soda, cinnamon, and salt. Stir until there are a few remaining streaks of flour.
Fold in chocolate chips and gently stir just until there are no remaining streaks of flour.
Fill each muffin cup 3/4 full. Top with a heaping 1/4 teaspoon of Nutella. Swirl the top with a toothpick or knife.
Bake for 17-20 minutes or until a toothpick inserted into the center of each muffin comes out clean. Allow muffins to cool for 5 minutes before transferring to a cooling rack to finish cooling. Enjoy!