The Good Food Guide

3 cups flour
2 teaspoons baking powder
½ teaspoon salt
1½ cups unsalted butter
1 2/3 cups sugar
1 cup light brown sugar
4 large eggs
2 tablespoons vanilla essence
1 cup chopped bitter or dark chocolate(or dark chocolate chips)
1 cup chopped walnuts or almonds (optional)

Method

-Preheat oven to 175*C. Meanwhile grease and dust a 9x13 inch baking tray.
-Sift together flour, baking powder and salt.
-In a separate bowl, cream together butter and both sugars for about 7 minutes, or until pale and thick. Beat in eggs one at a time. Whisk for a minute and add vanilla essence.
-Add walnuts in mixture if using. Stir chocolates and nuts into batter; fold in flour until just combined- do not beat.Batter will be thick and slightly stiff. Spoon into pan and bake for 45 minutes, or until top is golden and the inside moist.
-Cool pan on wire rack for at least 30 minutes before cutting into pieces and icing.