Preheat oven to 160°C (325°F).
Place the flour, cocoa, both sugars, butter, vanilla and eggs in a large bowl and mix until smooth.
Add the chocolate nuts and stir to combine.
Lightly grease a 20cm square tin and line with non-stick baking paper.
Spread the mixture into the tin.
Bake for 50 minutes to 1 hour or until the brownie is set.
Allow to cool in the tin for 5 minutes before slicing into squares and serving warm, or allow to cool completely in the tin.

Ingredients
Directions
Preheat oven to 160°C (325°F).
Place the flour, cocoa, both sugars, butter, vanilla and eggs in a large bowl and mix until smooth.
Add the chocolate nuts and stir to combine.
Lightly grease a 20cm square tin and line with non-stick baking paper.
Spread the mixture into the tin.
Bake for 50 minutes to 1 hour or until the brownie is set.
Allow to cool in the tin for 5 minutes before slicing into squares and serving warm, or allow to cool completely in the tin.