Preheat the oven to 180C and place baking paper in your baking tin(6cm x 26cm).
In a large bowl, add the melted butter, brown sugar, salt, baking powder and vanilla extract. Mix well with an electric hand mixer. Add eggs one at a time, and mix well for about 3 minutes until well combined. Add Nutella to the egg mixture and beat until light and fluffy. Mix in almond nips as well. Mix the flour in slowly and beat until well combined.
Pour the mixture into the baking tin covered with baking paper, and place in the oven for 35 -38 minutes. Once baked, take out and bang the pan a few times for the brownies to flatten and be dense.
Cut into desired brownie sizes, and decorate with melted chocolate.