Instructions

1. Preheat oven to 180 C (350 F) standard / 160 C (320 F) fan-forced. Grease and line an 8-inch square pan with baking or parchment paper, ensuring two sides of the paper overhang.
2.  Place butter and dark chocolate in a heatproof bowl and place in the microwave. Heat, stirring every 30 seconds, until melted and smooth. Add 1/2 cup of Nutella (set the other 1/2 cup aside) and stir together.
3. Next, add sugars and vanilla to the chocolate mixture and stir. Add eggs, one at a time, stirring in between. Finally, add the flour and salt and stir until the brownie mixture is smooth.
4.  Pour batter into the prepared tin. Then dollop the other 1/2 cup of Nutella all over the top and use a butter knife to swirl it into the brownie batter.
5. Bake the brownie for about 35 minutes or until cooked through. It should have a nice cracked top and no longer wobble in the middle. Leave to cool completely before serving. Store brownies in the fridge to make them extra fudgy.