Melted butter or margarine, for greasing
125g butter, chopped
200g (1 cup, firmly packed) brown sugar
125g dark chocolate, chopped
3 eggs
50g (1/3 cup) plain flour
35g (1/3 cup) cocoa powder
1/4 tsp baking powder
150g (1 1/4 cup) walnuts or almond nuts

Method
Preheat oven to 180°C.
Grease an 18 x 28cm cake tin with the melted butter or margarine and line the base of the pan with non-stick baking paper.
Place butter, brown sugar and chocolate in a large saucepan and stir over medium heat until well combined (see microwave tip).
Remove from heat and beat in the eggs using a wooden spoon.
Sift together the flour, cocoa and baking powder into the chocolate mixture and stir until well combined. Stir in the walnuts.
Pour into the prepared tin and bake in the preheated oven for 35-40 minutes or until firm and until a few crumbs cling to a skewer when it's inserted into the centre.

Notes:
These reliable brownies are equally delicious served as a dessert, straight from the oven in larger portions with scoops of vanilla ice-cream.
For those who are not big fans of nuts this brownie recipe is just as good without the walnuts.

Microwave tip: Combine butter, sugar and chocolate in a large microwave-safe glass or ceramic bowl. Heat, uncovered, for 2-4 minutes on Medium High/650 watts/70%, stirring every minute until well combined.

Recipe courtesy : Taste.com.au