Preheat your oven to 350°F (175°C) and prepare a 9-inch round cake pan by greasing it with butter or lining with parchment.

Whisk together the flour, baking powder, cinnamon, nutmeg, and salt in a large bowl.

In another bowl, whisk pumpkin puree, sugar, eggs, and melted butter until smooth.

Gradually pour the wet mixture into the dry ingredients and fold gently.

Pour half of the batter into the prepared pan, smooth it out.

Spoon dollops of Nutella over the batter and swirl gently.

Top with remaining batter, covering the Nutella layer completely.

If desired, add another layer of Nutella on top and swirl again.

Bake for 35-40 minutes until a toothpick comes out clean.

Let the cake cool in the pan for 10 minutes before transferring to a wire rack.