1 teaspoon sea salt or enough to sprinkle a good layer on top
Preheat oven to 350 degrees.
In a small bowl combine flour and salt and set aside. Using an electric mixer blend butter until light and fluffy. Mix in sugar, eggs, vanilla and mix well followed by Nutella and stir until mixture is creamy. Stir in flour mixture.
Pour in to greased 11”x7” or 8” square brownie pan sprinkle the top with sea salt and bake for 27-32 minutes. Cool pan on wire rack.