Ingredients
250 g butter, chopped

200g dark chocolate, chopped
1 ¾ cups brown sugar
1/3 cup cocoa
4 eggs
1 cup plain flour
¼ teaspoon baking powder
Method
1. Melt the butter and chocolate in a medium saucepan over gentle heat then cool slightly.
2. Stir in sugar, cocoa, eggs and sifted dry ingredients.
3. Spoon the mixture into a lined 23 x 23cm slab tin.
4. Bake at 160°C for 30-35 minutes.
5. The mixture will seem soft but will harden on cooling.
6. Allow to cool in tin before removing.