preheat oven to 350
Cut a piece of parchment paper so that it fits into your baking pan ,crease in the shape of the square pan Remove the parchment paper from the pan and place it on a cutting board and pour 1/2 cup of Nutella top with a few hazelnuts :) making sure it spread onto the parchment to fit the shape of the square pan place in freezer for 1 hour.
line 8*8 square baking dish with parchment paper. Leave parchment paper hanging over the sides of the pan so that you can remove the brownies from the pan later easier.
Whisk together the melted butter and both sugars in a medium bowl. whisk until it turns into a paste.
Add the eggs and vanilla and the cup of Nutella and mix again.
Add in dry ingredients into the bowl and mix with the whisk until everything is combine! DO NOT OVER WHISK!!!
Pour half of the batter into the lined baking pan take the Nutella out of the freezer, peel it from the parchment place on top of batter
Pour the remaining brownie batter on top of the frozen. Nutella piece.
bake for 35 minutes Begin checking the brownies at 25 minutes by inserting a toothpick in the middle. The top of the brownies should be crinkly and the toothpick should not come out clean. because of the center .
brownies are ready when the toothpick has wet crumbs, but not wet batter.enjoy.you can also add more Nutella on top and the reaming half of the hazelnuts for extra sweet Nutella brownies. or enjoy them without the Nutella frosting.