Preheat your oven to 350F.
In a bowl combine your nutella, room temperature unsalted butter, brown sugar, white sugar, egg, and vanilla extract. Stir to combine.
In another bowl, sift the baking powder, salt, and flour.
Slowly add your dry ingredients to the wet and mix until they are well incorporated.
Be careful not to over beat the ingredients.
In your preheated oven at 350F, bake the cookies for about 10-12 minutes.
Allow them to slightly cool down after, sprinkle some seat salt on top and enjoy them while they are still warm.